T’swan-chau, Fo-kien, China (Google Maps ⧉, OpenStreetMap ⧉)

"Zayton, as Martini and Deguignes conjectured, is T’swan-chau fu, or Chwan-chau fu (written by French scholars Thsiouan-tchéou-fou), often called in our charts, etc., Chinchew, a famous seaport of Fo-kien about 100 miles in a straight line S.W. by S. of Fu-chau."

"Dr. Douglas has suggested Chinkang, and T’swan-kok, i.e. “Kingdom of T’swan” (chau), as possible explanations of Chonka."