Not now, because no second bank is willing to give you a subprime mortgage; However, the new Property Law should allow the second mortgage of real estate, so it can be handled directly for a long time. If you want to do it now, there is a way. First of all, your real estate assessment value and mortgage value, that is, the actual realized value, are enough to cover the loan lines of the two banks. Secondly, find a formal and powerful guarantee company and mortgage the property to the guarantee company. The guarantee company will issue guarantees to the two banks respectively, but you must pay the guarantee fee and use the loan properly (the loan cannot be a mortgage loan).