If you can't move out, you can cancel the contract.
Some buyers buy a house just to be able to move their registered permanent residence, so if the seller does not move his registered permanent residence, it will bring great influence to the buyers, and then the buyers can choose to terminate the contract. The buyer can stipulate in the supplementary agreement of the contract that "if the seller cannot move out of the account for special reasons, the buyer has the right to unilaterally terminate the account, and the seller shall fully refund the house payment paid by the buyer" and other similar clauses to avoid the problem of account transfer.
? Source: Adu