Beginning November 29, 2016, Chinese passport holders with 10-year B1/B2, B1 or B2 (visitor) visas are required to enroll in Electronic Visa Update System (EVUS) when traveling to the United States by air or sea carrier or entering by a land port of entry. If you do not have a valid EVUS enrollment, you will not be able be to travel.
EVUS is the online system used by Chinese passports holders with 10-year B1/B2, B1 or B2 (visitor) visas to update basic biographic information to facilitate their travel to the United States. EVUS enrollments are valid for two years or until the traveler obtains a new passport or visa, whichever comes first. The latest EVUS information is available at CBP.gov/EVUS
How do I enroll?
Travelers can submit an EVUS enrollment at any time and will typically receive a response from the system within minutes after submitting their information; however, some responses may take up to 72 hours. CBP encourages travelers to enroll in EVUS when they begin planning their trip to the United States to avoid delays. To enroll, go to https://www.evus.gov