Introduction to the Residual Calendar Monument: The Residual Calendar Monument is 18 meters high, 30 meters wide and 11 meters thick. It is made of concrete and veneered with granite. It is in the shape of a three-dimensional calendar and is symmetrical on both sides. The huge stone calendar is riddled with bullet holes, and countless skeletons are vaguely visible, symbolizing the screams and cries of thousands of immortal souls. The page on the right is engraved with the most tragic day that the Chinese people will never forget - September 18, 1931, the seventh day of the eighth month of the Xinwei year of the lunar calendar. The historical facts of the "September 18th" Incident are engraved on the left page: "At about 10 o'clock at night, the Japanese army blew up the Liutiao Lake section of the South Manchuria Railway, falsely accused the Chinese army of doing it, and then captured Beida Camp. Our Northeastern Army officers and soldiers were ordered not to resist. The people retreated despite the pain, and the people rose up to fight." The entire building is solemn and solemn, with a unique style, which has both modern characteristics and national style, making everyone who visits recall that "National Humiliation Day".