The adobe houses in Hongqitun were covered with ice, and the crisp sound of pickaxes hitting the frozen soil became the first local lesson for this group of urban educated youths. Miss Shanghai Su Manli's cream can't withstand the severe cold of minus 30 degrees. The sickle of Wang Hongmei, the cadre's daughter, is always half a minute faster than others. In Zhao Weidong's military green schoolbag, the pages of the "Barefoot Doctor's Manual" are wrinkled with sweat.