Dianpao is Northeastern slang for a smack in the face, a slap or a punch. In drama it works as a flavour word that marks a character as local and blunt. Small Town Remedy uses it in a clip where the hero's showy Cantonese meets a dianpao from a local colleague.
Dramas
Where it comes up
Neon & Nine-to-Five
Small Town Remedy's hero can't follow his hometown dialect
Xiao Zhan's doctor in Small Town Remedy comes home to Northeast China and can't follow the local dialect. Viewers are already arguing over whether the show's Northeastern is real, and Cantonese speakers say his Cantonese isn't either. That double miss may be the point.