Borrowing someone else's social security identity to buy a house in Shanghai

Better not, refuse. Doesn't he have his own social security card? Does he hang your name on the property certificate of buying a house, or does he have to register it in your name before transferring the ownership?

Social security card has the functions of ID card and bank card. Will you give your ID card and bank card to others casually?

If you have a provident fund, you can also use it to buy a house yourself. Are you willing to give others money to buy a house?

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.