Control business loss. Yiqianqian is a mobile payment client launched by Ping An Pay, a subsidiary of Ping An of China. In addition to payment, Yiqianqian also has functions such as credit card, mobile phone recharge, e-commerce shopping, and payment of water, electricity and coal. There is a limit for transferring money in the software to bank cards, which is 50,000 each. Limits are used to control business losses and subsequent irreversible situations. Limits refer to the maximum amount set by the bank for a user's single transaction when paying and the maximum monthly expenditure amount.