墨守成規

hidebound by convention (idiom)

surname Mo / abbr. for 墨西哥[Mo4 xi1 ge1], Mexico

ink stick / China ink / CL:塊|块[kuai4] / corporal punishment consisting of tattooing characters on the victim's forehead

to guard / to defend / to keep watch / to abide by the law / to observe (rules or ritual) / nearby / adjoining

to preserve the accomplishments of previous generations / to carry on the good work of one's predecessors

surname Cheng

to succeed / to finish / to complete / to accomplish / to become / to turn into / to be all right / OK! / one tenth

established rules / the beaten track

compass / a rule / regulation / to admonish / to plan / to scheme