Chinese

{| style="clear: right;margin: 1em;border-collapse: collapse;text-align: center"

|- ! !deep; profound !ditch; gutter !high; tall !rampart |- !trad. (深溝高壘) | 深 | 溝 | 高 | 壘 |- !simp. (深沟高垒) | 深 | 沟 | 高 | 垒 |}

Idiom

深溝高壘

1. to dig deep trenches and build high defensive walls; to fortify one's position; to dig in