Building Cleaner Old Man, A Mop Teaches You A Lesson (40 episodes)

Duan Changqing, a night-shift cleaner at the Tianxi Building in Jiangcheng, wears an old work uniform and pushes a cleaning cart, treated as invisible by white-collar workers and rich heirs. That is, until Xie Jingyao, heir to a mega-conglomerate, bullies his granddaughter Duan Wanxing at a rooftop cocktail party and forces him to kneel and shine his shoes. Everyone assumes the cleaner can only endure it, but unexpectedly, Old Duan wrings out his mop, brings Xie Jingyao to his knees with a single sweep, and sweeps clean his true identity kept hidden for nineteen years.

Building Cleaner Old Man, A Mop Teaches You A Lesson - Episode 1