1, founded at different times: No.1 Zisha Factory, full name Yixing Zisha Craft Factory, made teapot from 1958 to 1997, while No.2 Zisha Factory was founded at 1980.
2. Different in nature: Zisha No.1 Factory is the only state-owned Zisha craft factory in China, while Zisha No.2 Factory is privately owned.