At 9:18 of September 18, air defense warning sounded Changchun city in memory of the 79th anniversary of Mukden Incident. This was to remind the public of the national humiliation. On this day, Changchun Puppet Palace Museum also launched a series of activities called never forget our national humiliation and love China.
On September 18, Japanese Guandong Army in northeast China attacked Shenyang as the start of Japan's aggressive war on China which is called Mukden Incident. After the break out of the war, all the three provinces in northeast China were occupied by Japanese Guandong Army which was seen as national humiliation by Chinese people.
(From News Center, translated by Zhang Yu, revised by Jiang Yansheng)