矛盾

contradiction / CL:個|个[ge4] / conflicting views / contradictory

spear / lance / pike

shield / (currency) Vietnamese dong / currency unit of several countries (Indonesian rupiah, Dutch gulden etc)

to contradict oneself / self-contradictory / inconsistent

internal contradiction

contradictions between ourselves and the enemy / Either you are for us or against us.

On the correct handling of internal contradictions among the people, Mao Zedong's tract of 1957

tensions between mainland China and Hong Kong (since 1997)

to be at loggerheads / to have a falling out

internal contradiction among the people (pretext for a purge)