The bottom of the purple clay pot is engraved by Yiyun, who is Yiyun?

Lu Shuoliang

Lu Shuoliang was born in 1949, courtesy name Yiyun and nickname Beichen. He is the founder of Yunxi Jingshe and one of the top ten famous purple sand masters in China. Passionate about calligraphy, painting, epigraphy, engraving and sculpture. He applied calligraphy, painting, sculpture and other expressive methods on the surface of purple clay pottery to create works. There are auctions of his stuff online.