Peer. Professor Zhou Qinghua from West China Hospital and Professor Zhang Guozhen from Shanghai East China Hospital participated in the World Lung Cancer Day large-scale public welfare activities and lung cancer science education activities. Zhou Qinghua and Zhang Guozhen are colleagues. Every year, 165438+ 10 is "Global Lung Cancer Concern Month", and165438+17 is "International Lung Cancer Day". Lung cancer is a malignant tumor with the fastest increase in morbidity and mortality and the greatest threat to people's health and life.