UK Ships shot at by Russia ! Crimea !, page-7

"they better get out of those waters"

The chinese might be people who are willing to kowtow, so I understand why you think the British should back off.
The chinese have been kotowing for the last 200 years, whether to outside powers or its own government. It is a habit that is hard to break

I dont think that is in the British nature so your concern is not warranted, but understandable.