As a Brit, I can't help but feel the censoring of Clash of Clans is not the real problem.
Unlike some other conflicts, the UK did 'lease' Hong Kong and I don't think anybody can really contest the return of that piece of land to China.
Where we could do better though, is in adopting all those people on that piece of land as British citizens and doing whatever we can to support them.
HK isn't like the middle east where the land has resources. The special thing about HK was solely the people on that random piece of land - and that was clearly understood by China with their creation of Shenzhen (and rolling that pattern out across the country).

In mainland UK, we're not doing 'great'
Industry and manufacturing is in decline and reliance of the service industries has skewed swathes of the country.
I can't help but think that the agility and captial of old HK, if brought back to the UK, would be amazing.