As of November 29, 2016, Chinese citizens with 10-year B1, B2 or B1/B2 visas in Peoples’ Republic of China passports are required to update their biographical and other information from their visa application through the Electronic Visa Update System (EVUS) before travelling to the United States. This update must be done every two years, or upon getting a new passport or B1, B2, or B1/B2 visa, whichever occurs first.
EVUS enrollment is available here. There is currently no fee for EVUS enrollment. Until a fee is implemented, travelers can enroll in EVUS without charge. The Department of Homeland Security, Customs and Border Protection (CBP) will keep visa holders informed of new information here.