China has no bilateral treaties with the world major economies such as USA, Japan, UK and Germany Although there is a case where a German court has registered a judgment of the Chinese court for enforcement in Germany. Whilst I doubt the UK would do the same in the absence of a treaty, it isn't outwith all bounds of possibility. However, the reasons I think you should be OK here is the small amount of money involved and the most important fact is that you say you have no assets. Even if they did go to the time and trouble to sue you in your absence (which would cost many times the amount actually due) and then instruct lawyers over here to try to enforce the judgment (which would also be expensive) there's nothing they can do with it if you have no assets. If they are sensible they will note that you've left China and write the debt off. I hope that helps. Happy to discuss. Please leave a positive rating so that I am credited for my time.