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

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

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

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

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 here commemorate the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

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. The September 18 Incident, which happened on Sept 18, 1931, marked the outbreak of Japan's large-scale invasion of China.

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. The September 18 Incident, which happened on Sept 18, 1931, marked the outbreak of Japan's large-scale invasion of China.

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. The September 18 Incident, which happened on Sept 18, 1931, marked the outbreak of Japan's large-scale invasion of China.

People visit the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

Visitors stand in silent tribute at the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

Visitors stand in silent tribute at the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

People visit the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

Visitors stand in silent tribute at the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

People line up to visit the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

A visitor stands in silent tribute at the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

Visitors stand in silent tribute at the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.

People visit the Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders in Nanjing, capital of East China's Jiangsu province, Sept 18, 2020. People from Nanjing and other places commemorated the 89th anniversary of September 18 Incident, which marked the outbreak of Japan's large-scale invasion of China.