Whose calligraphy and painting is this?

Li Shiming, a native of Qingyang, Gansu, was born in 1952. He loved calligraphy since childhood, and spent decades studying the calligraphy of Sun, Zhang Menglong, Zhang Qian, Wang Duo and Wei Bei, learning from others, forming his own style and constantly improving and innovating. He is good at calligraphy, cursive script, official script, official script, regular script and official script.