工于

gōng yú suàn jì

工于算计

very calculating

tā gōng yú gōng bǐ huā niǎo

她工于工笔花鸟。

She is adept at meticulously drawing flowers and birds.

gōng yú cì xiù jì shù

工于刺绣技术

be skilled in embroidery

gōng yú yuè qì

工于乐器

be apt with instruments

gōng yú xiě wù

工于写物

be versed in poems writing materials