校正

校正	jiào zhèng	to proofread and correct / to edit and rectify / to correct / to calibrate
校	jiào	to check; to collate; to proofread
校	xiào	(bound form) school; college / (bound form) (military) field officer
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