Yunzi (Traditional: 雲子; Simplified: 云子; Pinyin: Yúnzǐ) refer to special weiqi (Go) pieces manufactured in the Chinese province of Yunnan. At various times in history they have also been termed yunbian (云扁) and yunyaozi (云窑子). Though technically Yunzi refers only to sintered stones made of `yunzi` material (the exact compositi.....