Can I buy a second-hand house with a down payment of 20%?

PremisesPermit refers to the certificate that the buyer obtains the legal ownership of the house through the transaction and can exercise the right of possession, use, income and disposal of the purchased house according to law. That is, the "House Ownership Certificate" is the legal certificate for the state to protect the ownership of houses according to law. Proof that the owner manages and uses his own house. Property ownership certificate includes house ownership certificate and house ownership certificate. Generally speaking, the real estate license is the abbreviation of the house ownership certificate, which is a written certificate issued by the real estate registration authority to prove the ownership of the house.