A Study of Participants in China With Non-Small-Cell Lung Cancer That is Unable to be Treated With Surgery

Inclusion Criteria: Cohort 1: * Participants who have diagnosed with unresectable stage IIIB/IIIC/IV NSCLC * Participants who have been diagnosed six months before the start of the study were required to have two complete tumor assessments within at least 6 months intervals after the diagnosis * Participants who were newly diagnosed within six months before the start of the study were required to have complete baseline information (see section 6.4.1) * Participants who have received standard first-line treatment defined by guideline CSCO (https://www.csco.org.cn/cn/index.aspx) and NCCN (https://www.nccn.org/) Cohort 2: * Participants who are newly diagnosed with unresectable Stage IIIB/IIIC/IV NSCLC after the start of the study * Participants who are able to be followed up by the participating site * Participants planned to receive first line anti-cancer treatment targeting unresectable stage IIIB/IIIC/IV NSCLC in the study site after study initiation Exclusion Criteria: * Participants who have received prior systematic treatment for unresectable Stage IIIB/IIIC/IV NSCLC * Participants who have participated in any anti-cancer, regimen-specified clinical study of first-line treatment for unresectable Stage IIIB/IIIC/IV NSCLC