How to deal with the other party's default on payment? Ask for advice?

1. If you don't have enough evidence for this situation, you can only negotiate with the other party and return a part first, which can also reduce the loss. If you have a friend with you, you can ask a friend to help you convey it. If you still don't pay it back at all, it's hard to get it back.

Be careful when borrowing money in the future. If you can ask the other party to write the IOU, you must ask the other party to write it, and attach the identity information, and then keep the evidence for later reminder;

3. Protect your legitimate rights and interests.