If a bank loan defaults, first of all, you won't be sentenced, but you have to bear very big consequences:
1. The bank will blacklist you in the citizen credit information system, and your personal credit information will show the principal of the loan, how much interest you owe and the default time.
If you ignore this loan, the bank will sue you in court two years after your loan expires, and the bank will make compulsory repayment for you after the court decides.
In the future, as long as you apply for a loan, the bank's inquiry about your credit will be found, and you can't go anywhere.