Thanks everybody! I agree with 四哥 that I shall cancel my ID in China, just a little bit worry about the procedures and time will take, I will have very short time to stay in China.
国籍法规定加入外国国籍就丧失中国国籍,但没有要求你必须主动注销户口。所以,你不主动注销,不违法。/ r( b( l- c. W$ T- Q* D
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如果你在中国国内续签,你会被要求去注销户口。所以N多人去香港续签。* S' g0 j) C, |$ O! ]% _