Economic writing is economics, international trade, accounting, marketing, and other professional courses at the door.

经济应用文写作是经济学、国际贸易、会计学、市场营销等专业开设的一门专业课。

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This requires customs broker must have certain international trade and related knowledge and professional knowledge, but also the customs declaration to the professional skills.

这就要求报关员要具备一定国际贸易等相关知识和报关的专业知识，还要掌握报关的专业技能。

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The third, he should be knowledgeable of relative professional techniques, such as international trade, shipping, navigation, logistics, machines, engineering, products processing, etc.

三是精通专业技术，如国际贸易、航运、航海、物流、机械、工程、产品加工等知识；

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