WENHUI ZHAO received his B.S. degree in Geographic Information System from Shandong Agricultural University, Taian, China, in 2013, and his M.S. degree in Cartography and Geography Information System from Northwest A&F University, Xianyang, China, in 2017. He is currently pursuing hia Ph.D. degree in Cartography and Geography Information System at Beijing Normal University, Beijing, China. His research interests include solar-induced chlorophyll fluorescence, agricultural drought, and the estimation of NPP.