The seal of calligrapher Chu Suiliang. According to Chawenwen.com, the plum blossom seal is not the seal of the sect, but the seal of the calligrapher Chu Suiliang. Chu Suiliang (596 to 658 or 659), courtesy name Dengshan, was born in Qiantang, Hangzhou (now Hangzhou City, Zhejiang Province). Prime Minister, politician and calligrapher of the Tang Dynasty, he was the son of Chu Liang, a bachelor of Hongwen Museum.