NET‐G3 is consistent with the concept of highly proliferative NETs (well‐differentiated, Ki‐67 index more than 20% and <60%) proposed in China in 2013.1 Morphological features are still the gold standard for distinguishing subgroups of lung NETs, and the value of the Ki‐67 index in lung NET classification is still being investigated.19 Of the 392 patients (71.7%) with GEP‐NETs in this study, 52.3% were G1, 37.0% were G2, and 10.7% were NET‐G3. This evidence concerns the gene MKI67 and lung neuroendocrine neoplasm.