1February, 939, Mao Zedong put forward the slogan of "Do it yourself" at the production mobilization meeting in Yan 'an, aiming at the increasingly serious economic difficulties in the base area. Subsequently, various base areas gradually launched a large-scale production movement. After War of Resistance against Japanese Aggression entered the most difficult period, on June19431kloc-0/day, the Central Committee of the Communist Party of China * * * in the instruction of "Launching the Campaign of Reducing Rent, Producing and Supporting the Government and Caring for the People in Base Areas", asked all base areas to launch a large-scale production campaign of "overcoming difficulties by themselves" (except for the Shaanxi-Gansu-Ningxia Border Region, not to mention it for the time being). Later, the slogan of "Do it yourself and have plenty of food and clothing" was taken as the goal of overcoming economic difficulties and realizing self-sufficiency in production in each base area. After liberation, this slogan has always been a call to action by the party and the government to encourage people to help themselves in production when the country or a certain region is in economic difficulties.