On this day, 80 years ago, on May 31, 1945 (April 20, 1945, the Eighth Route Army launched a summer offensive against the Japanese and puppet armies in North China. On the 13th, the Hebei-Cha Military Region liberated Laiyuan City. In May 1945, the Eighth Route Army in various regions of North China began to launch fierce summer offensive operations. The troops of Shanxi, Hebei, Shandong and Henan launched attacks on both sides of the Pinghan Railway and the enemy in western and southern Shanxi. In mid-May, they launched Dongping and Yanggu battles, annihilating more than 9000 enemy troops and recovering 16 counties including Dongping and Yanggu; the main force of the Taihang Military Region of the Eighth Route Army launched the Battle of Anyang; The Taiyue troops attacked southern Shanxi and recovered Anze and Gaoping counties: the Shandong troops of the Eighth Route Army concentrated the main forces of Shandong, Binhai, Jiaodong, and Bohai regions to attack Anqiu, Zhucheng, and Pingdu, Shouguang and other places in the north of the Lubei Railway. A powerful offensive was launched to annihilate more than 20,000 Japanese and puppet troops and liberate a large area of land; the Shanxi-Chahar-Hebei troops successively launched battles such as Yanbei, Channan and Rehe on both sides of the Pingsui Railway and south of the Jincheng Railway. Recovered 3 county towns. At the same time, the campaigns of Ziya Hedong and Qing Hebei were launched south of the Beining Railway and west of the Jinpu Railway, recovering three county towns and approaching the suburbs of Peiping and Tianjin. In May, the Eighth Route Army wiped out a total of 68,000 Japanese and Puppet troops, recovered 33 county towns, expanded the Jiefang District by more than 60,000 square kilometers, liberated a population of more than 2.4 million, further compressing the Japanese and Puppet troops into large and medium-sized cities, major transportation routes and coastal areas. On the 17th, Hebei Central troops captured Xinzhen County, Hebei Province. This was the Eighth Route Army's cleanup of the puppet county government. On the 24th, the Eighth Route Army of Central Hebei cooperated with local armed forces to storm and liberate Anping City. On the 29th, Hebei Central Inspectorate troops captured Huai 'an County, an important town in southern Chana. On the 29th, Hebei Inspectorate troops captured Huai' an County, an important town in southern Chana.