This day, 29 February, in 1980, navigation between Shanghai and the Port of Portland in the United States was officially opened. The Port had been engaged in maritime trade with Tianjin in China and other places since the late 19th century, as the manufacturing centre and the most developed transportation distribution centre in the Pacific Northwest.
这一天，即1980年2月29日，上海和美国波特兰港之间的航运正式开通。 自19世纪末以来，该港口一直与中国和其他地方的天津进行海上贸易，作为制造中心和太平洋西北地区最发达的运输配送中心。
