Scammers
Be very careful with this company, they are scammers, they sell you a class of train ticket and then tell you that there is none, when you accept the class change, they tell you that there is already another reservation with your same name, the question It's just that it took me a week to buy some simple tickets from Shaghai to Yiwu, and in the end I had to buy the tickets with another company, a scam website.