After Hong Kong's successful immigration, should I cancel my account and ID card in the Mainland?

According to relevant data, the state stipulates that citizens can have one and only one account. Hongkong is an administrative region of China and a part of China. In principle, citizens need to cancel their household registration information at the original household registration department after receiving the relevant permanent residence permit and ID card. You can consult the local household registration department for details.

Regulations of People's Republic of China (PRC) Municipality on Household Registration

Article 6 A citizen should be registered as a permanent resident in his habitual residence, and a citizen can only be registered as a permanent resident in one place.

Article 10 If a citizen moves out of the jurisdiction of the household registration authority, he or the head of the household shall declare to the household registration authority for moving out before moving out, obtain a migration certificate and cancel the household registration.

Citizens who move from rural areas to cities must apply to the permanent residence registration authority for moving out with the employment certificate of the urban labor department, the school admission certificate, or the approval certificate of the urban household registration authority.

Citizens moving to border areas must be approved by the public security organs of the counties, cities and municipal districts where they live. Article 10 If a citizen moves out of the jurisdiction of the household registration authority, he or the head of the household shall declare to the household registration authority for moving out before moving out, obtain a migration certificate and cancel the household registration.

Citizens who move from rural areas to cities must apply to the permanent residence registration authority for moving out with the employment certificate of the urban labor department, the school admission certificate, or the approval certificate of the urban household registration authority.

Citizens moving to border areas must be approved by the public security organs of the counties, cities and municipal districts where they live.