About
HSK levels

    内线 內線

    nèixiàn

    1. inside source; mole; insider; inside information; insider connections
    2. (military) interior lines
    3. internal telephone line

    警察从内线获得了重要的情报。 jǐngchá cóng nèixiàn huòdéle zhòngyào de qìngbào.