7月9日，云南保山永子围棋工厂，刚出炉的手工滴制永子围棋。永子围棋以保山南红玛瑙、黄龙玉、翡翠和琥珀等天然原料烧制，已有五百多年历史，曾作为进献皇室的上乘贡品。如今，永子围棋的制作技艺被列入云南省非物质文化遗产保护名录，多次被指定为世界级围棋比赛用棋。[中新社 李进红 摄]
Workers make pieces for the Go board game in Baoshan City, Southwest China's Yunnan Province, July 9, 2017. The Go pieces, called stones, are made of natural materials including agate, jade and amber at the Yongzi Go Factory, which has a history dating back more than 500 years. In the past the pieces were made as gifts for the royal family. The manufacturing techniques have been declared an intangible heritage and the pieces produced here used in many world matches. (Photo: China News Service/Li Jinhong)