Generally speaking, your situation is called "stopping payment", which means that after paying for a certain period of time, you will no longer pay for the property before the agreed date. Because you are paying for a house, you said, "Can I just mortgage this house to the bank?" You don't even understand what you said. In fact, you mortgaged this house early on.

Let’s talk about the bank’s approach:

When the bank encounters you refusing to pay for the property, if you fail to pay for the property for three months, they will ask you about your situation. If you are sure that you do not want to pay, the bank will Recover the property rights (because your real estate certificate is mortgaged in the bank), and then send you a lawyer's letter telling you the situation. Later, it is possible to sell the house that originally belonged to you through a public auction or through an entrusted intermediary. The house will be returned to you before and after you get it. The amount returned is probably the balance of your loan (yours is 420,000). , 70% of the loan is 294,000, 42-294=126,000, then the money returned to you will not be more than 126,000, and the bank will deduct some handling fees and penalties).

However, if you cut off the payment like this, there will be consequences. Your personal credit will be completely destroyed, and it will be almost impossible for you to get a loan in the future (including buying a house, a car, a credit card, etc., as long as If it involves a loan, it is usually out of the question). I advise you to consider it carefully for the sake of your future life. At worst, you may sell it later.