The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: Xinhua)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)

The State ceremony for the National Memorial Day for Nanjing Massacre Victims is held at the memorial hall for the massacre victims in Nanjing, Jiangsu province, Dec 13, 2019. (Photo: chinadaily.com.cn)