Do China passport holders need a visa to visit PR?

Yes, a visa is required. Puerto Rico is a U.S. territory governed by U.S. immigration law, and Chinese ordinary passport holders are not in the Visa Waiver Program. You must obtain a U.S. B1/B2 visitor visa before traveling. Puerto Rico is an unincorporated territory of the United States, so the same federal immigration and visa rules that apply to the U.S. mainland apply to Puerto Rico. China is not a member of the U.S. Visa Waiver Program, which means Chinese ordinary passport holders cannot use ESTA and must apply for a U.S. nonimmigrant B1/B2 (business/tourism) visitor visa at a U.S. Embassy or Consulate in China. The process requires completing the DS-160 form online, paying the $185 MRV application fee, scheduling and attending an in-person interview, and providing supporting documents. There is no visa-on-arrival or eVisa option. Most approved applicants receive a 10-year multiple-entry visa; holders of 10-year B1/B2 visas must also enroll in the Electronic Visa Update System (EVUS) and pay the associated fee before each trip. There is no separate "Puerto Rico visa" - a U.S. visa is what is used. Entry decisions and length of stay (typically up to 6 months) are ultimately determined by CBP officers on arrival.