Recharge discount activities. Yi Jie top-up is an online top-up service. Users can use bank cards and Alipay to recharge their mobile phone bills and game cards. China Construction Bank and Yi Jie jointly launched some recharge preferential activities. For example, if you recharge your phone bill in Yi Jie with CCB credit card, you can enjoy the cash back discount in 30 yuan. This kind of preferential activity can encourage users to use CCB credit card for online recharge, increase the utilization rate and influence of CCB credit card, and also improve the user's stickiness and loyalty of Yi Jie recharge platform.