Showing: intervene
2 sentences for 出面 (chūmiàn — intervene)
yóuyú shuāngfāng jiāngchíbùxià, zhǐhǎo qǐng tiáojiě wěiyuánhuì chūmiàn.
Since both sides were at a stalemate, the mediation committee had to step in.
Source: Dong Chinese Dictionary