回复：So, what is the number you cal

http://www.usembassy-china.org.cn/visa/c/#非%20移%20民%20签%20证%20申%20请%20表

check this website， it has all the information, the phonenuber is: 4008-872-333 if you call form china, if you call from abroad， the number is （86-21）3881-4611.

Good luck!