He's coaching the juniors in Indonesia (Surabaya?). Last seen in Alor Star during the Asian Satellite? Event reported in this forum. One of his protegees, Silvanini (?) is an up-and-coming lady player.
this thread has some more information: http://www.badmintoncentral.com/forums/showthread.php?t=15183&highlight=Fang+Kai+Xiang