Used. The No. 1 Zisha Factory used the Jinding trademark. The Old No. 1 Factory is the abbreviation of the original Yixing Zisha Craft Factory in Jiangsu Province. It was founded in 1955 and was composed of seven old artists, Wu Yungen, Pei Shimin, Ren Ganting, Wang Yinchun, Zhu Kexin, Gu Jingzhou, and Jiang Rong, who concentrated on folk production at that time. It was established by purple clay craftsmen who made pots and pottery carvings and lasted more than 40 years.