Will the domestic hukou be cancelled after immigrating to Hong Kong for less than seven years?

Without a home visit permit, the domestic hukou will not be cancelled. It takes seven years to become a permanent resident after emigration. Seven years later, your account is still in the mainland. After seven years, you can choose. If you get a permanent resident in Hong Kong, you can apply for a Hong Kong passport, which means you will have to apply for a Home Visit Permit when you return to the Mainland in the future. Otherwise, you will always be a China account, so you know.