Local account holders do not need social security certificates. Foreign customers need to provide local tax payment certificate or social security certificate for more than one year when buying a house locally, otherwise they need to pay 50% down payment for the first time, which will be regarded as two mortgage, and the interest rate will be raised by 10%.
If you buy a house with a local loan, you don't need to provide proof of social security. Mortgage to buy a house needs to provide the following materials: down payment invoice, house purchase contract, ID card, marriage certificate, work certificate, income certificate and bank account.