走马观花 (走馬觀花) zǒu mǎ guān huā

zǒu mǎ guān huā set phrase look at something very briefly; to have a cursory look and gain a shallow understanding
Domain: Idiom 成语
Notes: Literally, to ride a horse while looking at flowers (CCI p. 36; CC-CEDICT '走馬觀花')