In Shenmue I & II Ryo gathered various pieces of information about the visit father made to Hong Kong & Guilin all those years ago, so I've tried to bring these together into a diagram showing some of these relationships and timelines.
The diagram includes some assumptions / guesses, which I talk about here:
Blog post:
http://www.phantomriverstone.com/2017/0 ... am-of.html
The character of Yuanda Zhu is quite enigmatic, as he seems to change what he says depending on who he is talking to. I don't think he has bad intentions towards Ryo, but I get the feeling he is hiding the true circumstances around the death of Sunming Zhao. It will be interesting to see how (or whether) this is developed in Shenmue III.