懂中文 Dong Chinese

蜻蜓点水

qīng​tíng​diǎn​shuǐ

superficial contact

Definitions

蜻蜓点水 (蜻蜓點水) 

qīng​tíng​diǎn​shuǐ

lit. the dragonfly touches the water lightly; superficial contact (idiom)

Sources