One: Line 1: a payment bill, generated when orders 1 order, and generates a payment bill (the payment bill related information micro channel required), set the timeout time of 2 hours, if the order expires, the user is prompted, Order timeout, a new order;
Method two: Order 1: N payment bill, generating orders 1 order, and generates a payment bill, record the payment order ID on the order, setting the timeout time of 2 hours, if the order expires, regenerate payment bill (to the micro-channel transmission It is to pay a single number), and bound to the order, so you can complete the payment