蜀犬吠日 [－－－－]

Jyutping suk6 hyun2 fai6 jat6
Pinyin shǔ quǎn fèi rì

Definitions (CC-CEDICT)
  1. lit. Sichuan dogs bark at the sun (idiom); fig. a simpleton will marvel at even the most common things
  2. alludes to the Sichuan foggy weather where it's uncommon to see a sunny day
Definitions (Wiktionary)
  1. phrase, idiomatic
    to be surprised at something common because of one's ignorance
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）