Nkolo Foe, a scholar from Cameroon, looks vegetables grown under LED light panels at the Tongfu Smart Farm in Taiyuanzhuang village, Zhengding county, along with other African scholars, on May 15, 2023. Photo: Hu Yuwei/GT

Nkolo Foe, a scholar from Cameroon, looks vegetables grown under LED light panels at the Tongfu Smart Farm in Taiyuanzhuang village, Zhengding county, along with other African scholars, on May 15, 2023. Photo: Hu Yuwei/GT