With the economic crisis coming,we know some of our business cooperates abroad already  havent been believable nowdays,they give you large orders,but they require the payment is as their requirement,and it seems like that they become to put off the money,how to communicate with them and let them pay for you asap?This situation is not only abroad,but also in our country,and it become a habit and more and more serious!Hope everyone to give some your own suggestions!