On the banks of the beautiful Songhua River in Jiamusi, Heilongjiang Province, in 2008 to celebrate the 40 years of the Zhiqing Shangshanxia Township, a characteristic park square "Zhiqing Square", I don't know if other cities have it. In the 1960s, Chairman Mao called on the intellectual youth to go to the countryside. Receiving the re-education of poor middle-class farmers, the inscription "broad world, great work", a generation of young people with a hot heart, millions of young people rushed to the Great Wilderness of North Korea to dedicate their beautiful youth, and now that generation has entered the year of flower, Let us remember the hard years they have fought.