上梁

to lay an upper beam / (a building's) upper beam / (a bicycle's) top tube

used in 上聲|上声[shang3 sheng1]

(bound form) up; upper; above; previous / first (of multiple parts) / to climb; to get onto; to go up / to attend (class or university) / (directional complement) up / (noun suffix) on; above

Liang Dynasty (502-557) / Later Liang Dynasty (907-923) / surname Liang

roof beam / beam (structure) / bridge

variant of 梁[liang2]

lit. If the upper beam is not straight, the lower beam will be crooked (idiom); fig. subordinates imitate their superiors' vices

driven to join the Liangshan Mountain rebels / to drive to revolt / to force sb to desperate action