Housing provident fund is a personal housing savings fund specially used by employees for housing consumption expenditure, which has two characteristics: first, it is cumulative, that is, although housing provident fund is an integral part of employees' wages, it is not paid in cash, but must be deposited in a special account opened by the housing provident fund management center in the entrusted bank, and special account management is implemented. The second is special. The housing provident fund is earmarked for special purposes and can only be used for the purchase, construction, overhaul of self-occupied housing or the payment of rent during storage. Only when the employee retires, dies, completely loses the ability to work, terminates the labor relationship with the unit or moves out of the original city can the housing provident fund in his account be withdrawn.