I haven't yet approached China by sea. When I went to Shanghai for a couple weeks in 2005 I went with British piloting charts, hoping to charter something that would get me out into the East China Sea. No luck. There were a couple of power boats across the river from the campus but no way to get my hands on them.
This time, going to Guangdong (Canton) I imagined coming up the Pearl River to Guangzhou, under sail, passing by the Portuguese outpost of Macao and the Brits in Hong Kong, landing in Guangzhou. But all I have is this photo of the Spirit of Baltimore 2 tied up by White Swan Hotel, not far from the stadium , of which I got a misty shot from the bridge over the Pearl River. Here's a link to Spirit 2's log of their 1998 voyage to East Asia.