香港人持有香港护照，现在北京要去美国旅游如何做EVUS签证网上登记

EVUS官网的解释是这样的：
How will this affect travelers from Taiwan, Hong Kong and Macau?
Anyone from these regions traveling on a Peoples Republic of China passport with a 10-year B1/B2, B1 or B2 visa will be required to enroll in EVUS. Travelers using other travel documents, including Hong Kong SAR, Macau SAR, and Taiwan passports may continue to travel to the U.S. as they currently do.
意思是，香港、澳门和台湾护照持有人赴美仍按现行规定。言下之意，EVUS登记不适用于三地护照的持有人，只适用于大陆护照持有人。