CBP Updates Electronic Visa Update System (EVUS) Frequently Asked Questions
EVUS is the online system used by nationals of China holding a 10-year B1/B2, B1 or B2 (visitor) visa periodically to update basic biographic information to facilitate their travel to the United States. In addition to a valid visa, such travelers will be required to complete an EVUS enrollment to be admitted into the United States.
Thanks very much for an outstanding job in obtaining my L1 visa through my company's request!