偏門

side door / doing things by the side door (i.e. dishonestly)

to lean / to slant / oblique / prejudiced / to deviate from average / to stray from the intended line / stubbornly / contrary to expectations

gate / door / CL:扇[shan4] / gateway / doorway / CL:個|个[ge4] / opening / valve / switch / way to do something / knack / family / house / (religious) sect / school (of thought) / class / category / phylum or division (taxonomy) / classifier for large guns / classifier for lessons, subjects, branches of technology / (suffix) -gate (i.e. scandal; derived from Watergate)