Answer analysis:

Bad assets can be divided into credit bad assets and non-credit bad assets. Bad credit assets

Before 2004, there were three kinds of overdue, sluggish and non-performing loans. After the implementation of the five-level classification in 2004, the non-performing loans were five.

The last three categories of hierarchical classification are secondary category, suspicious category and loss category. Non-credit non-performing assets are also classified in this way.