tianjin I: fun with rivers

Until you go to Tianjin, China, you don't even know what all you can do with a river. Things that never would have occurred to me to do on an only partially frozen river: go ice fishing; go ice chairing (you know, like ice skating, but you sit on a tiny chair and propel yourself with poles -- does this exist outside of Tianjin??); set off fireworks; ride a bicycle. (For some reason, it's the last of these that made me gape the most.)