China's central bank is conducting a trial monitoring of banks' off-balance-sheet wealth-management products under its macro-prudential assessment system, banking sources said.

The WMPs will be included in calculating broad-based credit, the sources said, asking not to be identified discussing non-public information.

Currently, the products aren't included in the assessment framework, and it's not clear when or if the People's Bank of China will add them, the sources said.