蜻蜓点水

qīng tíng diǎn shuǐ

lit. the dragonfly touches the water lightly

superficial contact (idiom)

qīng

see 蜻蜓[qing1 ting2]

tíng

see 蜻蜓[qing1 ting2]

diǎn

to touch briefly; to tap

shuǐ

water