A ceremony is held at the 9.18 Historical Museum in Shenyang, Northeast China's Liaoning Province, on September 18, 2023 to commemorate the 92nd anniversary of the September 18 Incident that marked the start of Japan's invasion of China and the beginning of the Chinese People's War of Resistance against Japanese Aggression (1931-45). Sirens howled in many major Chinese cities on the day, reminding people to stay vigilant against imperialism and militarism. Photo: Xinhua