I've tamed many and learned alot with yi ling. One of which were a climb up toward of the wall. It sounds weird but I will try to make the explanation make sense. First, you are going to need to climb on to a surface, then you are going to jump off of the wall, then try to go back on the wall while looking up, and once you've practiced enough, you'll master it. Sorry if my explanation did not make sense, I hope this helps tho!