National law enforcement agencies often have reciprocity with foreign countries. For example, the FBI has offices in many countries to facilitate things like in

National law enforcement agencies often have reciprocity with foreign countries. For example, the FBI has offices in many countries to facilitate things like investigations and extraditions. The common name is "Legat" and they operate in cooperation with and at the pleasure of the host country. https://www.fbi.gov/contact-us/international-offices https://www.fbi.gov/contact-us/international-offices It sounds like the Chinese police are operating like they're in their home country. Which they are not. Sooner or later, their activities are going to get them PNG'd (made Persona Non Grata) and they'll be asked to leave.