According to Chinese law, a person who owes 120,000 yuan on a credit card cannot be directly sentenced to prison. However, unpaid credit card debt may result in the bank taking legal action to recover the debt. Depending on the circumstances, here is what may happen:

1. Prosecution case: The bank can file a civil lawsuit in court and ask for the recovery of the amount owed. If the court rules in favor of the bank's request, you will need to repay the outstanding amount and bear the corresponding legal consequences.

2. Enforcement: If the debt has not been paid after the judgment takes effect, the bank can apply for compulsory execution, such as seizing property, freezing accounts, etc.

3. Record of dishonesty: Arrears may be included in the personal credit report system, affecting your credit record and credit score, which may have an adverse impact on future lending and financial activities.

It is recommended to consult a professional lawyer in time to understand the specific legal procedures and risks, and to comply with relevant legal regulations. In addition, if online loans are overdue, it is recommended that you obtain online loan big data reports from Netdome Data to see your comprehensive credit score, overdue information, prosecution status, etc.