China does have one such alliance: https://en.wikipedia.org/wiki/Sino-North_Korean_Treaty_of_Friendship,_Co-operation,_and_Mutual_Assistance https://en.wikiped

China does have one such alliance: https://en.wikipedia.org/wiki/Sino-North_Korean_Treaty_of_Friendship,_Co-operation,_and_Mutual_Assistance https://en.wikipedia.org/wiki/Sino-North_Korean_Treaty_of_Fr... Of course "talk is cheap" is an hyperbole, since there can be a lot of mutually beneficial agreements that don't involve military sacrifice https://en.wikipedia.org/wiki/2001_Sino-Russian_Treaty_of_Friendship https://en.wikipedia.org/wiki/2001_Sino-Russian_Treaty_of_Fr... https://en.wikipedia.org/wiki/Shanghai_Cooperation_Organisation https://en.wikipedia.org/wiki/Shanghai_Cooperation_Organisat...