http://www.the-savoisien.com/blog/index.php?post/Istvan-Bakony-Chinese-communism-and-chinese-jews

The Israelite leader Israel Joseph Benjamin II, Chacham of Israel, after his visit to China at the middle of last century, says in his report on Chinese clandestine Judaism, presented to the western Israelite leaders, that in one epoch the Chinese Jews mixed themselves with the population of the mongolic race through mixed marriages: "They keep their faith with the characteristic tenacity distinguishing the Hebrew race, they even now do not marry but women of their same religion"