I'm sorry to say but he's an idiot. I'm a Turk living in Hong Kong. I have friends back in Istanbul married to Chinese women. I envy their relationships. They are so happy together. No friend of mine complains at all. Additionally, pretty much all the Chinese girls I met, are amazing. Especially girls from northern China. In my opinion, you should just break up and move on. He's never going to change his mind. You said yourself:
He wants to end the relationship now as he sees no future to this to continue.
I'm sorry to be harsh but yeah these are my honest opinions.