Liu Wenxi's signature is generally in the upper right corner of the painting. This piece of painting paper is relatively long, so you should choose a horizontal composition. However, a vertical composition is used. Even if the composition is vertical, the characters should be lower and the signature should be below, which is obviously very strange. If he really painted it, it should be the lower part of the picture, the right part of the signature; Looking at the name again, Liu Wenxi's western characters should be relatively flat, like the shape of official script, but the west on the painting is thin and straight; Look at the picture again. The hand of the old man holding the cigarette is his left hand, but the original is his right hand. There are indications that this should be a fake. I hope it helps you.