This book was published in 1948 so please don't expect a new book. No dj.
FROM PRIOR TO THE TITLE PAGE:
"At various times in history colonies of Jews have gone to China and lived there. The city of K'aifeng, in the province of Honan, was a center for them. In China they have never been persecuted, and if they have suffered hardships, these were only the hardships of life in the community where they were.
In its basis, therefore, this novel may be said to be historically true, although the characters, with unimportant exceptions, are the creatures of my imagination. The story takes place at the period, about a centruy ago, when the Chinese had accepted the Jews, and when, indeed, most Jews had come to think of themselves as Chinese. Today even the memory of their origin is gone. They are Chinese.