2. If it is not returned in time, it will be considered as non-performing assets. It will affect your friend's credit in this country's bank.
3. If you are in a developed country in Europe and America, you will be contacted by a non-performing asset handler or lawyer.
If this is illegal according to the laws of this country, this bank may sue your friend at the card issuing place.
If you want to consider the future development or residence of this country, and there is an old saying in China that "it is only natural to pay back the money when you are in debt", it is suggested to pay back the money.
6. It doesn't matter if this country doesn't pursue credit card arrears+your friends have more money+you have to feel guilty about using other people's money+card handling is a country you hate. Personally, I suggest donating this 20,000 yuan to Project Hope!