从16世纪80年代至17世纪20年代，葡萄牙仗着它有着当时在世界上的最先进的商船（船体庞大，船帆高阔，速度也快，缺点是不能逆流行驶），以澳门为中心，开辟了三条海外航线（里斯本—果阿—澳门；澳门—长崎；澳门—马尼拉—墨西哥），使澳门成为中国对外贸易的一个重要转口港 From the 1680s to the 1720s, Portugal relied on the state-of-the-art merchant ships of its time in the world (large hulls, high sails, fast speed and shortcomings that can not be counter-current), Macao as the center, Opened three overseas routes (Lisbon-Goa-Macau, Macau-Nagasaki, Macau-Manila-Mexico), making Macao an important entrepot for China’s foreign trade