Fact is, China ain't Blighty. And I do not envisage things re racial discrimination changing fast here. But there are certain extra freedoms one can have here as a foreign teacher that one can't take advantage of in Blighty. In my opinion, they outweigh the negative aspect you mention. Please don't ask me what they are. I won't reply, more than to mention L's, F's, X's and Residence Permits that are inappropriate.
BTW, Blighty isn't the dog's bollocks either. Each country in this world has its unique +ves and -ves. The secret is to match your special needs with what the prospective host country has to offer
you. Maybe that's too general - sometimes particular areas of countries , such as backward parts of China, fit paricular westerners' needs. In contrast, developed zones such as Shanghai would be poison to some of us, me included.
One thing we can say is it's better to be white when it comes to being employed in China as an FT. A good angle for white people, and this should be exploited!

A totally stupendous post in all its content by Foxy, and I wish I had written it. This clearly is wise stuff. I would go a bit further and suggest to those that can't fit in without moaning, should moan their way back to the United Kingdom, or wherever else they think that the grass would be greener.