I saw a word called mortgage creditor's rights in Niu Niu, which publicized the mortgage creditor's rights of real estate. What is that?

I looked it up for you. The so-called real estate mortgage creditor's right refers to the borrower's loan with real estate as collateral. If the principal and interest cannot be repaid on schedule, the creditor has the right to dispose of the borrower's real estate according to law, and give priority to compensation with the proceeds. Simply put, it is to lend the money from cow powder to the borrower who mortgages the property.