Not sure where the bailing playing fields are, but the princeton map terminates around Jiantan after all. How are you seeing the waishuangxi on it? I'm guessing from where that map leaves off the river headed north between chengde and jihe, then shishang and jihe roads. If you look on google maps you can see pretty clearly that that whole swath is newer development. That would have left all of Shilin west of chengde/shishang on the other side of the river, on the same island with shezi, unless there was some sort of stream or flood plain where the current river bed is. You can also trace the trail on google maps pretty well where the outlet to the Danshui river separating shezi island was.
"Being alive is the meaning." -- Joseph Campbell
"Well I don't guess it has to be, but that's the way we like it." -- Roger Waters
There's only one thing left for me to do momma I gotta ding a ding dang my dang a long ling long