People attend a ceremony to commemorate the September 18 Incident and the Chinese People's War of Resistance against Japanese Aggression at the 9.18 Historical Museum in Shenyang, capital of northeast China's Liaoning Province, Sept. 18, 2022.

Shenyang, capital of northeast China's Liaoning Province, resounded with wailing air-raid sirens and vehicle horns on Sunday, the 91st anniversary of the September 18 Incident that marked the start of Japan's 14-year invasion of China. (Xinhua/Yang Qing)