Is the port of loading Qinhuangdao?

装货港是秦皇岛港吗？

FOB by sea price and advise port of loading?

海上离岸价钱，并告知装货港吗？

Seller provides confirmed name of vessels, port of loading and sail schedule.

卖方提供货轮名称，装货港口和货运时间表。

"Port of Loading" means the port at which the coal to be loaded in Indonesia.

装货港是指煤炭在印度尼西亚装运的港口。

To an extent, you have a point there: perhaps we'd better change the port of loading.

在某种程度上你的话有些道理；也许我们最好还是改变装船口岸。