自开商埠是近代中国不同于条约口岸的另一种口岸类型。
"Non-treaty Port" was different from treaty port in modern China.
镇江由于地处长江和大运河的交汇处，水运交通便利，因而在1856年签订的中英《天津条约》中被列为长江第一批通商口岸。
Zhenjiang, located at the intersection of the Yangtze River and the Grand Canal, is a city with convenient water transportation.
镇江由于地处长江和大运河的交汇处，水运交通便利，因而在1856年签订的中英《天津条约》中被列为长江第一批通商口岸。
Zhenjiang, located at the intersection of the Yangtze River and the Grand Canal, is a city with convenient water transportation.
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