An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
A locked padlock
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Official WeChat Account
Please call: 010-8531 4000
Outside of Office Hours, contact: 010-8531-3000
Outside of China: (+86) 10-8531 4000