Russian term coined during the Cold War to describe a warning that carries no real meaning.

An empty threat
Person 1: "Man, this asshole told me to pay him money or he will burn my house to the ground."
Person 2: "Relax, he probably gave you China's final warning."
by redocelot September 9, 2022
"China's final warning" (Russian: Последнее китайское предупреждение) is a Russian proverb that originated in the former Soviet Union, to refer to a warning that carries no real consequences.
Donald:'' Pooh said he will launch missiles if Mickey comes to visit his neighbour. He sounds serious!''

Vlad:'' Meh... That's him using China's final warning. Last time I stole pots of honey from him in Tuva and he didn't do nothing. ''
by TaiwanNo1 August 3, 2022