About
HSK levels

    里应外合 裡應外合

    lǐyìngwàihé

    1. to coordinate outside and inside offensives (idiom); (fig.) to act together

    警察在外面包围,内线同时里应外合,最后抓住了逃犯。 Jǐngchá zài wàimiàn bāowéi, nèixiàn tóngshí lǐyìngwàihé, zuìhòu zhuāzhùle táofàn.