Underground money houses originally refer to fake "banks" that are not supervised by the CBRC and other relevant departments. Its biggest disadvantage is that it is not regulated by relevant departments, and some problems may not be handled by relevant legal means for banks. Credibility cannot be guaranteed. Which means it's illegal.

Private loans can sign corresponding agreements. If not, go to the notary office for notarization, and you can get legal protection if you have any problems. This kind of loan may generally have a higher interest rate. It is a paid loan, not a loan.