At that time, the slogan was to dig deep and collect food extensively to prepare for the people's famine. What does this mean?

124 October, the Central Committee of the Communist Party of China * * * conveyed Mao Zedong's instructions on "digging deep pits, accumulating grain extensively and not seeking hegemony" when forwarding the State Council's report on grain issues. Since the mid-1960s, due to the overestimation of the international situation, Mao Zedong emphasized the importance of preparing for war, preparing food and cloth, digging air-raid shelters and repairing fortifications. According to these spirits, the Central Committee formally decided to set up a national leading group for civil air defense in August, and all provinces, municipalities and autonomous regions also set up leading groups for civil air defense at all levels, and carried out mass activities of digging air-raid shelters and trenches nationwide. Therefore, the scale of civil air defense projects has expanded rapidly on the existing basis, and the specifications of civil air defense projects have been continuously improved.