mainstream faction; main faction
Refers to the dominant group within a political party, organization, or movement, as opposed to minority or dissident factions.
Within the party, conflict between the mainstream faction and the anti-mainstream faction continues.
He decided to follow the opinion of the mainstream faction.
主流派 highlights being the numerically or politically dominant group, while 正統派 stresses fidelity to traditional or correct principles.
Compound of 主流 (main current, mainstream) and 派 (faction, group).