If economic conditions permit, you can keep it for the time being, and renting it is also a good idea. If not, you can sell it. There may be deed tax here, so you need to consult the Housing Authority in your district.

Question 2: What about your account?

If you don't buy a house, you can go to the public security bureau for the record, and then transfer it to the name of the house when the house comes down. If you want to buy, your account needs to be transferred back to your home country.

Question 3: Insurance and provident fund

Now both insurance and provident fund can be moved with you, which means that if you have a unit in your hometown, you have to move to a new unit.

Another way is to transfer insurance. Clean up the provident fund. If you don't buy a house, you can temporarily not transfer Tianjin provident fund and insurance.

In fact, the best advice for you is: when your house falls down, transfer your account to the name of the house and develop in your hometown. Tianjin's social security and provident fund are temporarily suspended. If they develop well in their hometown, it is not too late to move their registered permanent residence and insurance accumulation fund back to their hometown.