Mao Zedong said: "The countryside is a vast world, where there is much to be done." 1968, 1968 In February, Mao Zedong issued the instruction of "educated youth going to the countryside to receive re-education for poor middle peasants", and the movement of going to the countryside was launched on a large scale. During the Cultural Revolution, the total number of educated youth going to the countryside reached160,000, accounting for the city. Almost no urban family in China is not associated with "educated youth" going to the countryside.