Walkthroughs for custom maps.

I'm leaning towards closing the loop and finally completing Xiedu.

Perhaps there are detailed speedruns for Xiedu on some Chinese websites, but I haven't seen any.
However, on Richard Chen's well-known YouTube channel, he posted battles with heroes on a map a couple of months ago, and you can see a pretty good time for that map there. He finished the map in 4-4-2.
If you want to see a map time on YouTube.