The main purpose of buying a house is to check the housing situation under the name of the purchaser and judge whether it meets the conditions for buying a house. With the continuous rise of housing prices, many governments have introduced various purchase restriction policies to regulate the real estate market and maintain the stability of the market economy. When buying commercial housing in areas that are included in the purchase restriction, the first thing to consider is the qualification of buying a house. Many qualifications for buying a house are based on the number of years of social security purchase and the number of housing units under the name of family members. The number of housing units under the name of family members here is authoritative information obtained from relevant departments through search. The financial loan interest rates of the first suite, second suite and third suite of major banks are different, so the loan interest rate of which suite is also determined through house purchase search.