深耕细作

deep plowing and careful cultivation

worker / workshop / (slang) troublesome / high-maintenance (person)

to do; to engage in / to write; to compose / to pretend; to feign / to regard as; to consider to be / to be; to act the part of / to feel (itchy, nauseous etc) / writings; works

old variant of 深[shen1]

deep / depth / deeply / (of a color) dark / deep / rich

deep (lit. and fig.)

thin or slender / finely particulate / thin and soft / fine / delicate / trifling / (of a sound) quiet / frugal

variant of 耕[geng1]

to plow / to till

deep plowing / thorough penetration / thorough development (of a market segment etc)

police spy / secret agent