Headlines You Don't See Everyday: "Chinese Sufis in Yemen"

Following a link to a new blog called Even Unto China, which seems devoted to Chinese and East Asian links to the greater Islamic world, and clearly takes its name from the hadith of the Prophet, Itlib al-‘Ilm hatta al-Sin (Seek Knowledge, even unto China), I was struck by a post — a tantalizing one since it doesn't go into much detail, but includes photos of an old manuscript — carrying as a title four words I don't think I've ever seen together before: "Chinese Sufis in Yemen."