[_cerv]

In an alternate world where the New Territories had their lease renewed, they probably would remained semi autonomous and any kind of full on independence would agitate China. I don't think they would have sought to isolate other nations over recognizing HK as PRC territory as the UK wields a bit of weight, but you probably would have seen some measures put forth that would have at least required private entities operating in China to treat HK as an extension of Chinese territory, much like what goes on today with Taiwan.