在我看来教师的素描与画家的素描是有些差异的。于振平是美院的教师，但他的素描更象画家的东西。素描对于于振平来说，只是一种情感的表述方式，或是一种语言形态，他为自己欢喜而画，画得他自己喜欢。于振平的素描好看，具有一种写意性，长线条和斜线排列成灰面，有些还用 In my opinion, the sketches of teachers and painters are somewhat different. Yu Zhenping is a college teacher, but his sketch is more of an artist’s thing. For Yu Zhenping, the sketch is just a way of expressing emotions or a linguistic form. He draws himself for joy and draws his own favorite. Yu Zhenping sketch looks good, with a kind of freehand, long lines and slashes arranged in gray surface, and some still use