信用证(L/C---lettle of credit)是一种有条件的银行付款承诺，承担第一付款责任，是一种银行信用，代替买卖双方负责付款和提交单据，对进出口双方（特别是彼此不熟悉的客户）的利益较有保障。

In L/C transaction, the banker is responsible to pay money and tender documents on behalf of both parties.

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人们不再是面对面的、看着实实在在的货物、靠纸介质单据（包括现金）进行买卖交易。

People are no longer face-to-face , look at the true goods , depend on the paper medium document (including the cash ) to carry on the business transaction.

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