With a POD of 960 AD, have Chinese Jews as an ethnicity be as important as possible in China.
Just a correction, by the Ming they were basically the same as any urban Chinese, not a mercantile community. The Jewish community was indeed very small though, which is of course why it no longer exists.You'd need more of them in China -- as a small trade community I just don't think they had the numbers, whereas in Ethiopia they had numbers and in India they had contact with Jews elsewhere.