Lu Jiao Mu (鹿角木)

Drawing of a Lu Jiao Mu (highlighted), from 'Wu Bei Zhi (《武備志》)'.

Lu Jiao Mu (鹿角木, lit. 'Deer horn wood') was the Chinese name for abatis. It was simply a cut down tree with dense branches, with its trunk partially buried underground.

This defensive weapon had an ancient Roman counterpart, known as Cippus (plural Cippi).