Very good. Shiquan lettering purple sand flowerpot is particularly good. Shiquan is the stage name of Tan Quanhai, a master of purple sand pottery carving. Tan Quanhai's works are highly collectible. However, there are many purple clay pots that imitate stone springs, so we should carefully identify them. Shi Quan, male, 1968, born in Xuancheng, Anhui Province in May, is a national senior arts and crafts artist and a purple sand artist.