C300 Shadow's cry for help

I told Tang Rou that this photo was sent by the shadow.

In this period of time, she hadn't called him, but Tang Rou's hand was shaking as she held the phone. She constantly zoomed in and out of the picture. Her expression was very strange.

"Do you know this painting? I also feel that there's something familiar about it, but I can't recall where I've seen it before