Back in the 90s, the U S Diplomatic Mission in the old Embassy in Havana was undergoing a major upgrade. We had a crew of contractors from California overseeing the Cuban workers. The contractors, as well as all U S personnel, especially the Marine Security Guards, had to play by “Moscow Rules”: absolutely no fraternization with Cuban nationals. If one was caught with a Cubana, one would be on the next plane out. The NCOIC intuited that two of his Marines were in an apartment with a couple of Cuban girls; these guys were on the next plane back to Quantico to begin processing back to the fleet.
Similar rules for Beijing Embassy five years ago. How do you think that went? Compliance was lip service.