4.9 to 5.5. According to information from the real estate inquiry website, the lowest interest rate for first-home mortgages in Hezhang, Guizhou in 2023 is 4.9, and the lowest interest rate for second-home mortgages is 5.5. Mortgage interest rate refers to a loan processed at a bank for purchasing a house. The interest on the loan must be paid according to the interest rate specified by the bank.