Sichuan Zhangyu Classroom Technology Co., Ltd. and its affiliates (hereinafter referred to as "Zhangyu Classroom" or "we") respect and protect the privacy of all users of Zhangyu Classroom's services. When you use the "DuckPTE" application (hereinafter collectively referred to as "DuckPTE" or the "DuckPTE App") and its related services provided by us, we may collect and use your relevant information. We wish to explain through this Privacy Policy how we collect, store, protect and use your personal information, and to clearly inform you of how we handle your personal information. This Privacy Policy is related to your use of Zhangyu Classroom's services, and we therefore recommend that you read it in full to help you better protect your privacy.
If you have any questions about this Privacy Policy, you may contact us through the contact information published on our platform. If you do not agree with any part of this Privacy Policy, you should immediately stop using our services. When you use any service we provide, it indicates that you have agreed to our lawful use and protection of your personal information in accordance with this Privacy Policy.
I. Scope of Application
This Privacy Policy applies to our platform services. This Privacy Policy applies when you visit our platform and/or log in to the relevant client to use our platform services.
It should be noted in particular that this Privacy Policy does not apply to services provided to you by other third parties. For example, when a third party on our platform provides services to you relying on our platform, the personal information you provide to the third party is not covered by this Privacy Policy, and we assume no responsibility for the use of information provided by you by any third party.
II. Information Collection
When we provide services, we may collect, store and use the following information about you. The collection of information is to provide you with better and higher-quality services. The ways in which we collect information are as follows (for details, please view the Personal Information List):
1. Information You Provide
Information filled in and/or submitted when you register an account and/or use or pay for our related services, including your name, gender, nationality, language, occupation, education, age, phone number, email address, address, interests, payment account and related additional information (such as your province and city, postal code, etc.).
Shared information you provide to other parties through our services, and information stored when you use our services.
2. Information Collected During Your Use of Services
In order to provide and optimize the services you need, we may collect information related to your use of services. Such information includes:
* (1) Device Information: When you use the APP (including when running in the foreground, silently in the foreground, or in the background), we will receive and record device-related information (including device model, operating system version, device settings, device environment, carrier and other hardware and software characteristic information), and location-related information of the device (including GPS location authorized by you, as well as IP address, WLAN access point (e.g., SSID, BSSID), Bluetooth and base station sensor information);
* (2) Log information refers to technical information that the system may automatically collect through cookies or other means when you use our services, to determine your country and language of use, etc.;
* (3) Service log information: When you use the products or services provided by our website or client, we will automatically collect detailed information about your use of our services and save it as service logs, including browsing, click viewing, search queries, favorites, transactions, after-sales, following and sharing information, posted information, as well as IP address, browser type, carrier, language used, date and time of access;
* (4) Information searched or browsed when using our services, such as web search terms used, URLs of social media pages visited, and other information and content details browsed or requested when using our services;
* (5) Information about our mobile applications (Apps) and other software you have used, and information about how you have used such mobile applications and software;
* (6) Information (metadata) contained in content you share through our services, such as the date, time or location of photos or videos taken;
* (7) Information provided and recorded when using our services, including but not limited to purchasing courses etc.
Our Cookies do not collect additional information from your computer's browser or hard drive. Most browsers have an option to reject storing data to Cookies on your computer. You can modify your acceptance level for Cookies or reject our Cookies, however we do not recommend doing so, as this may in some cases affect your secure access to our related websites and use of the services we provide.
3. Sensitive Permission Access
* (1) Camera: For functions such as uploading avatars and uploading images;
* (2) Microphone: For functions such as uploading audio recordings;
* (3) Photo Library (Gallery): For functions such as uploading avatars and uploading images;
* (4) Clipboard: For copy-paste when editing content, and content change comparison functions;
* (5) Network Communication: For communicating with the server;
* (6) Notification Permission: For push notification and reminder features;
* (7) Storage Permission: For functions such as image downloads and file downloads.
The above functions may require you to grant us permissions on your device such as camera, microphone, photo library, clipboard, network, phone and storage read/write, in order to collect and use the information involved in these functions. Please note that enabling these permissions means you authorize us to collect and use this information to implement the above functions. If you revoke these authorizations, we will no longer continue to collect and use your information, and will be unable to provide you with the functions corresponding to these authorizations.
If we collect or use your information beyond the above circumstances, we will seek your consent in advance and fully inform you of the purpose, method and scope of information collection and use.
4. Third-Party SDKs
To ensure the implementation of certain independent functions and to enable you to use and enjoy more services and features, we will embed third-party SDKs in the application after carefully evaluating the purpose of such SDK use:
SDK Name: Getui Push SDK (Package: com.igexin)
Developer: Daily Interactive Inc.
Information Collected: Device information (IMEI / IDFA / Android ID / MAC / OAID / Google Advertising ID (GAID) / Serial Number / IMSI / UAID / ICCID), installed app list, network information (SSID / BSSID / IP address / WLAN access point / Wi-Fi list / base station information), location information (longitude & latitude / precise location / approximate location)
Purpose: To provide push notification services
Privacy Policy: https://docs.getui.com/privacy
SDK Name: Xiaomi Push SDK (Package: com.xiaomi.mipush.sdk)
Developer: Xiaomi Technology Co., Ltd.
Information Collected: Device information (Device Serial Number IMEI, device model, phone OS, etc.), app information (APP version number, etc.), network-related information (IP or domain connection result, current network type), system language information, message delivery result information
Purpose: To ensure you receive our push notification services
Privacy Policy: https://dev.mi.com/console/doc/detail?pId=1822
SDK Name: Huawei Push SDK (Package: com.huawei.hms.push)
Developer: Huawei Technologies Co., Ltd.
Information Collected: App version number, app package name, app AppId, open capability or sub-capability identifier, API call identifier, API call result, API response latency, device model, network connection type
Purpose: To ensure you receive our push notification services
Privacy Policy: https://developer.huawei.com/consumer/cn/doc/HMSCore-Guides/sdk-data-security-0000001050042177
SDK Name: Meizu Push SDK (Package: com.meizu.cloud.pushsdk)
Developer: Zhuhai Meizu Technology Co., Ltd.
Information Collected: Device information (Device Serial Number IMEI, device model, phone OS, etc.), app information (APP version number, etc.), network-related information (IP or domain connection result, current network type), system language information, message delivery result information
Purpose: To ensure you receive our push notification services
Privacy Policy: https://open.flyme.cn/docs?id=202
SDK Name: OPPO PUSH Client SDK (Package: com.heytap.msp.push)
Developer: Guangdong Huantai Technology Co., Ltd.
Information Collected: Device information (Device Serial Number IMEI, Serial Number, IMSI, User ID, Android ID, Google Advertising ID, phone region settings, device model, battery level, phone OS version and language), app information (APP package name and version, running status), Push SDK version number, network-related information (IP or domain connection result, current network type), message delivery result, notification bar status (notification permission, user click behavior), lock screen status (whether screen is locked, whether lock screen notifications are allowed)
Purpose: To ensure you receive our push notification services
Privacy Policy: https://open.oppomobile.com/new/developmentDoc/info?id=11228
SDK Name: vivo PUSH SDK (Package: com.vivo.push)
Developer: Vivo Mobile Communication Co., Ltd.
Information Collected: Device information (Device Serial Number IMEI, Serial Number, IMSI, User ID, Android ID, Google Advertising ID, phone region settings, device model, battery level, phone OS version and language), app information (APP package name and version, running status), Push SDK version number, network-related information (IP or domain connection result, current network type), message delivery result, notification bar status (notification permission, user click behavior), lock screen status (whether screen is locked, whether lock screen notifications are allowed)
Purpose: To ensure you receive our push notification services
Privacy Policy: https://dev.vivo.com.cn/documentCenter/doc/366
SDK Name: Honor Push SDK (Package: com.hihonor.push)
Developer: Honor Device Co., Ltd.
Information Collected: Device information (device identifier AAID, PushToken), network information, app anonymous identifier
Purpose: To ensure you receive our push notification services
Privacy Policy: https://agreement.itsec.honor.com/asm/agrFile/getHtmlFile?agrNo=1114&country=cn&branchId=0&langCode=zh-cn
SDK Name: Sentry SDK (Package: io.sentry)
Developer: Functional Software, Inc.
Information Collected: Device information (IP address, device type, unique device identifier, browser type, operating system), software installed on the device / specified package name information, product key, general location information (inferred from IP address), referrer URL
Purpose: To monitor application errors and collect crash reports
Privacy Policy: https://sentry.io/privacy
SDK Name: ZhuoXin ID SDK
Developer: Zhonghu Zhian (Beijing) Technology Co., Ltd.
Information Collected: Basic device information (manufacturer, model, system information, network information), device environment information (screen brightness, battery status, region), device app information (app name, package name, version, installation information)
Purpose: To provide device identification and security risk control services; traffic anti-fraud; to generate anonymized basic device IDs
Privacy Policy: https://zxid.mobileservice.cn/privacy
For more information on the purposes, methods and scope of SDK processing of personal information, please view the Third-Party SDK Information Collection & Sharing List.
5. Auto-Start or Associated-Start Statement
* (1) Without your consent and without a reasonable use scenario, we will not auto-start or associated-start other Apps;
* (2) The DuckPTE App provides a local timed study reminder function. When you agree to this Privacy Policy and exit the App after use, the App may auto-start or associated-start to push study reminder notifications to you. To disable this, please go to Phone Settings - Permission Settings - Auto-Start and turn it off;
* (3) When you access a webpage within the App that is not supported by the in-App WebView (such as a file download page), or when you actively choose to open a page in an external browser, a third-party App will be associated-started.
III. Use of Information
Because we collect your personal information (including Device Serial Number IMEI, IMSI, Device MAC address, location, phone number, images, audio and video, etc.) to provide you with services and improve service quality, in order to achieve this purpose, we may use your information for the following purposes:
1. To provide the various services you use, and to design, maintain and improve these services;
2. To use for identity verification, customer service, security protection, fraud monitoring, archiving and backup purposes when we provide services, to ensure the security of the products and services we provide to you;
3. To match you with suitable learning guidance advisors and learning content based on your needs, region, age, occupation, language skills, background, interests and learning preferences;
4. Software certification or management of software upgrades;
5. To provide you with more relevant advertisements in place of universally broadcast ones;
6. To invite you to participate in surveys about our products and services, or promotional and lucky draw activities;
7. Other purposes to which you have given your permission and consent.
IV. Information Sharing
We have a duty of confidentiality regarding your personal information (including Device Serial Number IMEI, IMSI, Device MAC address, location, phone number, images, audio and video, etc.) and will not sell or rent any of your information to third parties. We will only share your information with third parties in the following circumstances, and your use of our services constitutes your agreement that we may share your information with third parties in the following circumstances:
1. With your prior consent or authorization;
2. In accordance with the requirements of laws and regulations or as required by administrative or judicial authorities;
3. To share your personal information with our affiliates;
4. Third-party SDKs required for functions and services — for details on the specific purposes, methods and scope, please view the Third-Party SDK Information Collection & Sharing List;
5. To provide your personal information to trusted partners, so that they may process such information on our behalf in accordance with our instructions and in compliance with our Privacy Policy and any other appropriate confidentiality and security measures;
6. If you are a qualified intellectual property complainant who has filed a complaint, disclosure to the respondent upon the respondent's request, to enable both parties to handle possible rights disputes;
7. Only by sharing your information can we provide the services you need or handle disputes or disputes between you and others. For example, in a transaction you create on our platform, if any party to the transaction has performed or partially performed their obligations and requests information disclosure, we may, as appropriate, provide that user with necessary information such as the contact details of the other party to the transaction, in order to facilitate the completion of the transaction or resolution of the dispute;
8. If you violate Chinese laws, regulations, our related agreements or related rules, disclosure to third parties is necessary;
9. To find, prevent or handle fraud, security or technical issues;
10. In emergency situations, to protect the interests of users and the public;
11. To protect the legal rights and interests of us and our affiliates or users.
V. Information Protection
To protect the security of your information, we strive to take various reasonable physical, electronic and managerial security measures to protect your information from leakage, damage or loss, including but not limited to SSL, encrypted information storage, and data center access control. We also implement strict management of employees or outsourced personnel who may have access to your information, including but not limited to adopting different permission controls based on different job positions, signing confidentiality agreements with them, and monitoring their operations. We will provide corresponding security measures to protect your information using existing technology, provide reasonable security guarantees, and will do our best to ensure that your information is not leaked, damaged or lost.
Your account has security protection features; please keep your account and password information safe. We will ensure that your information is not lost, misused or altered through security measures such as backing up data to other servers and encrypting user passwords. Despite the foregoing security measures, please understand that there is no such thing as "perfect security measures" on information networks.
When using our platform services for online transactions, you will inevitably disclose your personal information to the counterparty or potential counterparty, such as bank account information, contact details or postal address. Please protect your personal information carefully and only provide it to others when necessary. If you discover that your personal information has been leaked, especially your account and password, please contact our customer service immediately so that we can take appropriate measures.
You have the right to manage your personal information, including querying and correcting your account information. You can perform the above operations through the function settings provided in the App.
You can independently go to "Settings - Personal Settings - Cancel Account" within the App to cancel your account. Before cancellation, we will verify information such as your phone number. Account cancellation is irreversible. Once you cancel your account, we will no longer collect your personal information and will immediately delete all information related to your account. At the same time, you will no longer be able to obtain services from our products through the cancelled account.
VI. Protection of Minors
We encourage parents or legal guardians (hereinafter collectively referred to as "guardians") to guide minors under the age of eighteen in using our services. We suggest that minors encourage their guardians to read this Privacy Policy and recommend that minors seek the consent and guidance of their guardians before submitting personal information. Zhangyu Classroom will establish and maintain reasonable procedures to protect the confidentiality and security of minors' personal data.
VII. Disclaimer
We shall not be liable in the following circumstances:
* Any personal information leakage resulting from you disclosing your user password to or sharing your registered account with others.
* Any personal information leakage, loss, theft or tampering caused by force majeure events affecting normal network operations, such as hacker attacks, computer virus intrusion or outbreak, or temporary closure due to government regulation.
* Any personal information leakage caused by other websites linked to this website and any legal disputes and consequences arising therefrom.
VIII. Changes
We may revise the terms of this Privacy Policy from time to time, and such revisions constitute a part of this Privacy Policy. If such revisions result in a material reduction of your rights under this Privacy Policy, we will notify you by prompting at a prominent location on our platform, sending you an email, or by other means. In such circumstances, if you continue to use our services, it indicates that you agree to be bound by the revised Privacy Policy.
IX. Contact Us
If you have any questions, comments or suggestions about this Privacy Policy, please contact us through the following means:
Sichuan Zhangyu Classroom Technology Co., Ltd.
Email: support@duckpte.com
Address: Room 1709, Tower A, Times Square, No. 2 Zongfu Road, Jinjiang District, Chengdu, Sichuan
In general, we will reply within fifteen business days.
This agreement takes effect on June 26, 2026.