Quality tracing system introduced in E China

Zhao Guilan, a villager of Qianzhao Village, picks eggplants in a cooperative greenhouse in Gaoqing County, east China's Shandong Province, Dec. 6, 2017. Quality tracing system was introduced to Gaoqing County with vegetable having its own QR code which contains basic information for customers to scan.(Xinhua/Zhu Zheng)