Yes, Shanghai is an ice-free port.
是啊，上海港是一个不冻港。
The city and the areas around it are an ice-free port and a nuclear-weapon-free zone.
那城市及其周围的地方是不冻港和无核区。
Qinhuangdao is an ice-free port in north china and the biggest export port for energy resources . it is also a beautiful seaside tourist city.
秦皇岛是中国北部的一个不冻良港，是目前中国最大的能源输出港口，同时也是一个美丽的海滨旅游城市。
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