The purchase method for this activity of Bank of Communications is as follows:

1. Open the home page of Pay Bar APP.

2. Search Huihuan to enter the event page.

3. Click "Buy Now".

The coupon red envelope that can be received with a Bank of Communications credit card is 30 yuan. The 60 yuan credit card repayment red envelope obtained from the activity is distributed in 12 months. A 5 yuan credit card repayment red envelope is issued every month, which can be repaid. 5.01 yuan is deducted by 5 yuan, which can save 30 yuan in credit card repayment in 12 months.