China to hold online Lunar New Year's shopping festival

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Certain visitors to qstheory.cn choose to interact with qstheory.cn in ways that require qstheory.cn to gather personally-identifying information. The amount and type of information that qstheory.cn gathers depends on the nature of the interaction. For example, we ask visitors who use our visitor's personal page system to provide a username and email address.

In each case, qstheory.cn collects such information only insofar as is necessary or appropriate to fulfill the purpose of the visitor's interaction with qstheory.cn. qstheory.cn does not disclose personally-identifying information.

We use the information you provide to register for an account, receive newsletters, use certain other services, or participate in qstheory.cn's open source project in any other way.

We will not sell or lease your personal information to third parties unless we have your permission or are required by law to do so.