这个本金保证产品是一个合同，期限从3年到15年，根据一系列复杂的市场交易，保证客户的回报在一个特定的水平，银行同时也获得收费和利润。

The CGP is a contract, ranging from three to 15 years, usually guaranteeing clients a certain level of return on a complicated series of market plays, with the bank obtaining fees and profits as well.

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