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Why is it that the search for Chinese is not displayed? 你好，搜索中文不支持吗？搜索“五年级”时，书签里有的为什么搜索不出来？ 有些搜索时不全部出现？ Hello, is searching for Chinese not supported? When searching for "fifth grade", why can't some of the...

When a user logs in, can a username appear here? Because I have several usernames,

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 当用户登录之后，这里能不能出现个用户名？因为我有几个用户名，  When a user logs in, can a username appear here? Because I have several usernames,