If he is going to take on a project in which he assumes risk by not knowing his profit margin in advance, "There has to be a big pot at the end of that rainbow," he says.

如果让他在不能预知利润空间的前提下，冒险接手一个项目，他认为这好比水中花，镜中月。

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Net asset profit margin is usually regarded as a key data used to value a company. However, this data has a lof of flaws, like time, risk, valuing and so on.

净资产收益率通常被视为是评价一家上市公司的关键指标，但它存在着时效性、风险性、价值性等方面的缺陷，仅靠它来评判上市公司发展潜力有可能走入误区。

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