C293

I'm getting more and more confused about Old Yun's identity, but based on my grandfather's current temper, he definitely wouldn't tell me.

The instant he went upstairs, he saw through a crack in the stairwell a large white cloth on the wall in front of him. He vaguely saw that it didn't seem to be a painting, so why did he cover it and not let anyone see it?

I couldn't figure it out