On this day, 84 years ago, on February 10, 1941 (January 15, 1941 in the lunar calendar), the Chinese Communist Party's war of resistance behind enemy lines in North and Central China entered a difficult period. The Eighth Route Army's supply of supplies was at its lowest level. In February 1941, the Japanese North China Front Army decided that it would still focus on "suppression of the Communist Party" based on the plan of the base camp and the dispatch army headquarters, requiring its various departments to be more active in fighting and quickly restore "public security"; In terms of combat guidance, it was emphasized that the overall strength of the military, government and the people must be given full play to the overall strength of the military, political, economic and cultural forces to consolidate its occupied areas. In order to strengthen the North China Front Army, the Japanese headquarters transferred troops from Central China, thus bringing the Japanese army's strength in North China to 11 divisions and 12 independent mixed brigades totaling about 300,000 people. In addition, there were still more than 100,000 puppet troops. On the North China battlefield, the Kuomintang army numbered about 500,000, but it continued to carry out military attacks and economic blockade on the Anti-Japanese Base Areas of the Eighth Route Army. At the same time, more than 30,000 people openly surrendered to the enemy, cooperating with the Japanese army's "mopping up","nibbling", and "public security strengthening movement" to attack the Eighth Route Army, bringing the anti-Japanese war behind enemy lines in North China into a period of serious difficulties. The Japanese army has a total of more than 260,000 troops in Central China, 110,000 often fight against the New Fourth Army. In addition, there are 150,000 puppet troops. Since the Japanese army has regarded Beijing, Shanghai, and Hangzhou as key garrison areas since this year and has continued to "mop up" and "clear villages" against the New Fourth Army and the Central China Anti-Japanese Base Areas, the Kuomintang diehards continued to implement their plan to eliminate the New Fourth Army after the Southern Anhui Incident, and the War of Resistance behind enemy lines in Central China has also entered a period of serious difficulties. The Japanese army set up blockades all over North China to besiege the Chinese army