Literature Reference: Though I wield the brush with renown in the shadows, mending the imperial robes in court, my rank remains humble. Source from 'He Wei Zhi Shi Er Shi San Shou He Chou Zheng Shi Yu Dong Yang Chun Men Fang Huai Zhui Yue You Jian Ji'.
补: Mend. Ameliorate. Supplement.
衮:
The royal robe of ancient Chinese monarchs. When used in personal names, it symbolizes noble status and commands respect.
Meaning: Mending the imperial robes symbolizes loyalty and assisting in rectifying the emperor's faults.