According to Zhihu's inquiry, after Quark logs off, personal information will be completely deleted, including but not limited to name, contact information, browsing records, etc. This information cannot be recovered or retrieved, so even if someone wants to find the cancelled quark account, they can't find any relevant information. In addition, as a formal Internet company, Quark will strictly abide by relevant laws and regulations to protect users' personal privacy. When canceling the account, Quark will handle it according to relevant regulations to ensure that the user's personal information will not be leaked or abused.