Regarding the transfer of authority, there were essentially two types. One was to overthrow opponents directly with violent means, suppress them, and annihilate the enemy to seize power.
Such struggles had no rules, or rather, they trampled all rules outright, upending the established order through violence to forge an entirely new set of rules, thereby taking control of authority.
But with such transitions, everything depended on strength; strength alone guaranteed everything and could overwhelm all scheming and break all conspiracies. Without strength, all was empty talk.
Just like Master Pei's rise, he went from insignificant to his current status, and secured his position by displaying the strength that forced others to accept him and act according to his will.