Shadow banking is like — and a lot of people have said this — it's a really amorphous, broad term that includes a bunch of stuff that doesn't share characteristics.
影子银行就像——很多人都这么说过——它是一个非常无定形的、宽泛的术语,包括一堆没有共同特征的东西。
英语百科
Shadow banking system
The shadow banking system is a term for the collection of non-bank financial intermediaries that provide services similar to traditional commercial banks but outside normal financial regulations. Former US Federal Reserve Chair Ben Bernanke provided the following definition in November 2013: