The series of purple casseroles innovated and developed by Su broke through the technical difficulties and subverted the industry tradition. It is not only made of raw purple sand from Huanglong Mountain in Yixing, but also inherits the excellent health care function of purple sand. This shows that Sue is a company, and the casserole is produced by Sue, that is to say, they are the same.

Gulizi casserole comes from Su Yitang, a century-old workshop in Yixing, China. Developed and designed by Shao Yi, the third generation inheritor of Zisha and a Japanese ceramic master.