功能：1. You have to sign up a contract with Cathay.
2. Cathay will give you some data, enter the data into Cathay payment setting in meepShop
3. Meeshop system will automactically create two return url
4. set this two url as return url by calling Cathay
5. After Cathay setting up the return url, you have to test by yourself first.
6. When you finish testing, call Cathay to change from 「testing situation」 to 「formal situation」