Zhao Trench chairman road position in yonghe County, Potou township Zhao Trench village, On March 29, 1936, MAO Zedong, Peng Dehuai in Zhao Trench issued "The Chinese people's Anti-japanese Red Army northwest military committee for consistent anti-japanese national people's book", asked to stop all civil war, regardless of the Red Army white army, common, united anti-japanese.