People here commemorate the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China. (Photos: Xinhua)

A bell-ringing ceremony is held to mark the 89th anniversary of the September 18 Incident in front of a monument at the September 18 Incident History Museum in Shenyang, northeast China's Liaoning Province, Sept. 18, 2020.

A bell-ringing ceremony is held to mark the 89th anniversary of the September 18 Incident in front of a monument at the September 18 Incident History Museum in Shenyang, northeast China's Liaoning Province, Sept. 18, 2020.

A bell-ringing ceremony is held to mark the 89th anniversary of the September 18 Incident in front of a monument at the September 18 Incident History Museum in Shenyang, northeast China's Liaoning Province, Sept. 18, 2020.

A citizen observes a moment of silence to the sound of sirens to mark the 89th anniversary of the September 18 Incident in Shenyang, northeast China's Liaoning Province, Sept. 18, 2020.

A traffic police officer observes a moment of silence to the sound of sirens to mark the 89th anniversary of the September 18 Incident in Shenyang, northeast China's Liaoning Province, Sept. 18, 2020.

People observe a moment of silence during a ceremony marking the 89th anniversary of the September 18 Incident at the Palace Museum of the Manchurian Regime in Changchun, northeast China's Jilin Province, Sept. 18, 2020.

An opera is staged to mark the 89th anniversary of the September 18 Incident at the Palace Museum of the Manchurian Regime in Changchun, northeast China's Jilin Province, Sept. 18, 2020.

A student writes down her name during a ceremony marking the 89th anniversary of the September 18 Incident at the Palace Museum of the Manchurian Regime in Changchun, northeast China's Jilin Province, Sept. 18, 2020.