On Feb 25, 2021, our paper “Potential of hotspot solar-induced chlorophyll fluorescence for better tracking terrestrial photosynthesis”, led by Dalei Hao, is published at Global Change Biology. This study reveals that leaf physiology, canopy structure, and sun‐sensor geometries all affect the SIF‐GPP relationship. Also it seems a good use of viewing angle (e.g., magical hotspot angle) can help improve SIF-GPP linear relationship.