The preposition between is used in case of two persons or entities.
An agreement was signed between China and Pakistan.
Note: The preposition between can be used in reference to more than two ----- in case of specific number of people/mutual relationship and cooperation.
The Davis Cup going to be played between, Russia, England & Australia.
TheLaver Cup is an international indoor hard court men's team tennis tournament betweenTeam Europe and Team World, the latter of which is composed of players from all other continents except Europe.