What you want to ask is which three emperors made outstanding contributions to Jingxi rice in the long river of history? Kangxi, Yongzheng, Qianlong. In the agricultural history of China, rice in the west of Beijing was the only food crop that attracted the emperor's attention. Both Emperor Kangxi and Emperor Qianlong vigorously promoted the cultivation of rice in western Beijing. In the long river of history, emperors Kangxi, Yongzheng and Qianlong of the Qing Dynasty left immortal achievements for Jingxi rice.