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[Special reminder] Please comply with local laws and regulations and prohibit uploading any confidential files to private or public clouds.

The public cloud has a variety of functions to facilitate the access of other users, such as link sharing, and files stored in the public cloud may be accessed by others, so please do not upload content involving personal privacy and infringing on the interests of others to the public cloud.

Shanghai Dihuang Infomation Technology Co., Ltd. (hereinafter referred to as "Chengtong Network Disk") attaches great importance to the protection of user information, but when you use our services, we may collect and use your relevant information. The purpose of this "Privacy Policy" is to clarify to you how we collect, use and protect your information when you use the service. Please read and fully understand the "Privacy Policy" carefully before using the services provided by the company. Once you use the service, you acknowledge and accept the constraints of the "Privacy Policy".

1.1 The information you provide to Citycom.com.

When you register an account or use the services provided by Citylink, the personal information you provide to Citylink includes but is not limited to your mobile phone number, email address, ID number, bank card number, etc. In the case that you voluntarily choose the service or provide relevant information, the service system of the city network disk will automatically store the aforementioned information.

1.2 The information we obtain when you use the services of Citycom.com.

1.2.1 Log information: When you use the Citycom network disk service, the server will automatically record some information, such as your usage of our service, IP address, URL of the accessed service, browser type and usage language, date and time of visit, etc.

1.2.2 Crash information: When you experience a crash or other abnormality when using the service of the Citycom network disk, the Citycom network disk will send the crash report to the Citycom network disk after getting your confirmation. Crash reports can help us diagnose problems with the Chengtong network disk. Chengtong Network Disk will try to avoid sending user personally identifiable information, but the crash report will contain information about your operating system version and operating status at the time of the failure.

1.2.3 Device Information: Some products and/or services contain unique application numbers. When you install, activate, update, uninstall related services or when these services regularly communicate with CityCom network disk (such as software updates), the system will use this number and installation-related information (such as operating system type and application version) number) to the Chengtong network disk. In order to provide better service and experience improvement for different types of devices, the citycom network disk will record the hardware model, operating system version number, the International Mobile Equipment Identity (IMEI) of the mobile phone, and the hardware address (MAC) of the network device of the mobile phone. and other information.

1.2.4 Location information: When you use the Citycom network disk service with the positioning function, the system will automatically process the location information of the device, so that you do not need to manually enter your own geographic coordinates to obtain related services. For example, in the citycom network disk map service, if you use "current location" for geographic query, CityCom Network Disk may provide you with location-based services.

1.2.5 Cookie information:

• Cookies are mainly used to authenticate your identity and help the website to carry out data statistics, which helps us to provide you with more thoughtful and personalized services based on your information, such as advertising optimization, to you Provide ads that are relevant to you rather than general advertising.
• When you use Citycom products or services, a cookie will be sent to your device, and the services you and we provide to our partners (such as advertising and/or promotional services, as well as other services that may be displayed on other websites by Citycom.com) will be sent to your device. When interacting with the service function provided by the disk), we allow cookies to be sent to the Citycom network disk server.
• You may choose to refuse cookies. You can refuse cookies by modifying your browser settings. If you choose to reject cookies, you may not be able to log in or use the services or functions of the CityCom network that rely on cookies.

1.2.6 User Experience Improvement Program:

• We will invite you to participate in the user experience improvement program when you use the Citycom network disk product, and you can choose to refuse to participate.
• In order to improve the product and meet the new needs of users, we will continue to increase and improve product functions, so we need to know the usage of each product function, that is, how many users are using this product function, so that we can monitor the usage of each product function. The importance of making sound judgments.
• If you participate in this plan, we will collect the usage times and parameter setting information of some functions of the citycom network disk; the mobile phone version of the cloud disk user experience improvement plan will collect your mobile phone model, software system version number and some functions used. situation data. For the data collected, we perform aggregated statistical analysis in order to continuously improve our products.
• You can opt in or out of our User Experience Improvement Program at any time in the Settings Center.

2.1 Improve services and improve user experience

Through the use of the collected information, Chengtong Netdisk will better understand how you use our services, so as to provide you with personalized services and help Chengtong Netdisk to improve Chengtong Netdisk products or develop new products /Serve.

2.2 Account security protection

When we provide services, we use them for authentication, customer service, security, fraud detection, archiving and backup purposes to ensure the security of the products and services we provide to you.

2.3 Advertising Services

Citynet may work with its partners to provide you with the services you request or to show you content that may be of interest to you, including:

• Instant messaging services, online media services, interactive entertainment services, social networking services, payment services, Internet search services, location and map services, application software and services, data management software and services, online advertising services, Internet finance, and other social media , entertainment, e-commerce, information and communication software or services (collectively, "Internet Services");
• Third-party Internet service providers, and third-party goods or services related to: food and dining, sports, music, movies, television, live performances and other arts and entertainment, books, magazines and other publications, clothing and accessories, jewelry , cosmetics, personal health and hygiene, electronics, collectibles, household utensils, appliances, home decor and furnishings, pets, automobiles, hotels, transportation and travel, banking, insurance and other financial services, loyalty points and rewards programs, and what we believe are Other goods or services that may be relevant to you.
• In the case where the information is necessary for the product/service, you agree that Citycom can share the necessary information with it. If you do not want us to use your personal information for the above-mentioned advertising purposes, you can ask us to stop using your personal information for the above-mentioned purposes through the relevant prompts we provide in advertisements or the guidelines provided in specific services.

2.4 Statistics

Citynet may conduct statistics on product usage. At the same time, Chengtong Netdisk may share these statistical information with the public to show the overall usage trends of our services. These statistics do not contain your personally identifiable information.

2.5 Information Sharing

In the following cases, CityCom network disk may disclose your information:

• Get your prior authorization;
• Using public cloud services;
• As required by laws, regulations, legal process, or government authorities;
• For the purpose of academic research or public interest;
• In order to safeguard the legitimate rights and interests of Chengtong Netdisk, such as finding, preventing, and dealing with fraud or security issues;
• Complies with the applicable Terms of Service or Policy of Use.

Chengtong Netdisk attaches great importance to information security, and develops and applies a variety of security technologies and procedures to prevent information loss, improper use, unauthorized viewing or disclosure. However, please understand that due to technical limitations and various malicious means that may exist, in the Internet industry, even if we do our best to strengthen security measures, it is impossible to always guarantee 100% information security. You need to understand that the systems and communication networks you use to access our services may have problems due to factors beyond our control.

4.1 Mobile data backup

4.1.1 During the use of the mobile phone, information such as contacts, text messages and other information may be lost due to system crash, hardware damage, flashing the mobile phone system firmware, or loss of the mobile phone. Data cloud backup can encrypt and back up important data such as address book, mobile phone photos and mobile phone videos to the Citycom network disk security center. When the user's mobile phone data is accidentally lost, the data can be quickly restored to the mobile phone to avoid losses. Mobile phone backup realizes data backup and recovery across mobile phone operating systems. When you change mobile phones, you no longer have to worry about importing information such as contacts and mobile photos from old mobile phones.

4.1.2 Mobile phone backup function already supports backup/restore data:

• Mobile phonebook
• Pictures
• Video
• Each of the above is user selectable

4.1.3 Description of the behavior involved in the mobile phone backup service:

• When you choose to backup data, you need to encrypt the backup data in your personal mobile phone and upload it to the Citycom network disk for storage and backup, so as to ensure that the data can be retrieved or restored when needed in the future. Mobile phone backup and recovery is a user-selective function, and only after you choose to use this function, Chengtong Network Disk will provide you with this service, and the traffic charges generated during the use of the function are subject to the relevant regulations of the operator.
• The mobile phone backup service will save the history of your backup, and can record your backup time each time, so that you can choose a different backup point to restore. All backup data is encrypted (including uploading and storage) to ensure that your private data cannot be viewed or accessed by any unauthorized program.

4.2 Stealth Mode. Users can set important files to hidden mode, set security keys for hidden mode, and double encryption to protect users' files. Using this function, CityCom Network Disk will not collect the user's personal information.

4.3 Users can search for friends and add them by entering the name of the network disk or the account number of the network disk, and can match friends through the mobile phone address book. Friends can be managed through the friend list, and friends can be deleted at any time. After deletion, the user's sharing and information can no longer be sent and received. Users can completely control their friends list by using the above functions, they can reject their friends' verification applications, and they can also pull their friends into the blacklist. When using the address book for friend information matching, the software will encrypt and transmit the mobile phone number in the address book to the Citycom network disk server, so as to match users with friends who are also using the Citycom network disk product. After the matching process is encrypted, the software will not transmit and record the contact name corresponding to the mobile phone number, nor will it not save the information, and will not use the information for other purposes.

5.1 Our services allow you to publicly share information about you not only with your own social network, but also with all users of cloud storage services. For example, the information you upload or post on our Services (including your public personal information, lists you create), your responses to information uploaded or posted by others, and including location data related to such information and log information. Other users of our services may also share information about you (including location data and log information). In particular, our social media services are designed to allow you to share information with users around the world, and you can make shared information available in real-time and widely. As long as you do not delete the shared information, the relevant information will remain in the public domain; even if you delete the shared information, the relevant information may still be independently cached, copied or stored by other users or unaffiliated third parties not controlled by us, or by other Users or such third parties are kept in the public domain. Therefore, please consider carefully the content of information uploaded, published and communicated through our services. In some cases, you can control the range of users who have the right to view your shared information through the privacy settings of some of our services. If you request to delete your relevant information from our services, please do so through the methods provided in these special terms of service

5.2 Certain personal information may be considered sensitive personal information due to its specificity, such as your race, religion, personal health and medical information, etc. Sensitive personal information is more strictly protected than other personal information. Please note that the content and information you provide, upload or post when using our services (such as photos about your social activities, etc.) may reveal your sensitive personal information. You need to carefully consider whether to disclose relevant sensitive personal information when using our services. You agree to the processing of your sensitive personal information for the purposes and methods described in the Privacy Policy.

We will do everything possible to take appropriate technical means to ensure that you can access, update and correct your registration information or other personal information you provide when using our services. When accessing, updating, correcting and deleting the aforementioned information, we may require you to authenticate to ensure account security.

If you need to log out of your account, you can log in through the official website and click the avatar in the upper right corner, click Personal Information, click the logout button on the left, view the logout prompt, and click Confirm to logout. Once you confirm the cancellation, your account will not be able to log in immediately, and you can apply for account recovery within 7 days after applying for cancellation. After the deadline for account recovery, your account will be permanently cancelled. If you still need to use our services, you need to re-register your account.

Citynet complies with the relevant laws and regulations, and stores the user's personal information collected during the provision of the Citycom network within the territory of China. If some products or services involve cross-border, we need to transmit your personal information overseas. We will strictly follow the laws and regulations and ensure the security of your personal information.

Citynet will, within the scope of relevant laws and regulations, formulate reasonable and feasible measures to avoid collecting unnecessary personal information of users, and keep your personal information for the shortest period required to achieve the purposes stated in this policy. information. When you cancel your account or voluntarily delete your personal information, the CityCom network will continue to retain your information within 6 months after the account cancellation is completed or the personal information is deleted in accordance with the requirements of laws and regulations.

When Chengtong Netdisk stops operating, Chengtong Netdisk will notify you in the form of push notifications, announcements, etc., and delete or anonymize Chengtong Net according to the requirements of laws and regulations after the suspension of operation. all of your personal information held by the disk.

Chengtong Netdisk attaches great importance to the protection of minors' information. If you are a minor under the age of 18, you should obtain the consent of your parents or legal guardians in advance before using the products and/or services of SkyDrive.

CityCom Network Disk may revise the terms of the "Privacy Policy" from time to time, and such revisions constitute part of the "Privacy Policy". If such amendments result in a material reduction of your rights under the Privacy Policy, we will post them prominently on the home page before the amendments take effect. In this case, if you continue to use our services, you agree to be bound by the revised Privacy Policy.

1. Anonymous Identifiers: Anonymous identifiers are usually random strings that are usually used to identify some user devices, including specific mobile devices. For example, the International Mobile Equipment Identity (IMEI) of the mobile phone, the hardware address (MAC) of the network device of the mobile phone, etc.

2. Cookie: A mechanism that supports server-side (or scripting) storage and retrieval of information on the client-side, extending Web-based client/server applications by adding simple, persistent client-side state. The server sends a status message while returning the HTTP object to the client, which is saved by the client. The range of URLs valid in that state is described in the state information. After that, all HTTP requests within this range initiated by the client will return the current value of the status information from the client to the server, and this status information is called Cookie.