9.In 1864,a roast duck restaurant Quanjude was opened outside the Qianmen. -1864年，一家名为全聚德的烤鸭店在北京前门外开业。9、In 1864, a roast duck restaurant Quanjude was opened outside the Qianmen. --- 1864年，一家名为全聚德的烤鸭店在北京前门外开业