正牌

正牌	zhèng pái	officially recognized; genuine; legitimate
正	zhēng	first month of the lunar year
正	zhèng	straight / upright / proper / main / principal / to correct / to rectify / exactly / just (at that time) / right (in that place) / (math.) positive
牌	pái	signboard; plaque; plate; tablet (CL:块) / brand; trademark (CL:个) / mahjong tile; domino; playing card (CL:张) / (bound form) fixed pattern for lyrics or set melody in classical poetry or music (used in 词牌 and 曲牌)