How long did Shengjing Bank call home after the deadline?

Shengjing Bank will call home 30 days after the deadline. When the cardholder is overdue for more than 30 days and can't contact himself, the bank will call the cardholder's family. Within 7~ 15 days after the overdue time, the loan bank mainly sends a text message to make a dunning. The cardholder hasn't paid it back for 7~ 15 days, and the loan bank starts to collect it, calling to remind the repayment every day. This call is usually made directly to the cardholder.