1. You were arrested because your credit card was overdue 100 days.
2. Detailed description:
A. Overdue repayment will lead credit card companies to take legal measures to recover debts.
B The legal department of Tianjin Branch may have taken relevant measures, including sending people to arrest them.
C. If the arrears cannot be repaid within two working days, the legal risks may be further aggravated.
3. Summary: If the overdue payment is not repaid within the specified time, it may face more serious legal consequences.
4. Extended information:
According to the laws of China, banks have the right to take legal measures to recover overdue debts.
B specific restoration measures and time limits may vary according to regions and laws.
Please note that the above answers are based on the information you provided and may be assumed without detailed background knowledge. I suggest you contact the bank as soon as possible to find out the specific repayment arrangements and methods to avoid further legal disputes.