語句
唔知道白米嘅價錢,比喻唔知道生活艱難;全句係「食米唔知米貴」 to be ignorant of the hardships in life, literally "not knowing the price of rice"; in full, 食米唔知米貴
Nowadays youths are ignorant of the hardships in life? But a senior official is out of touch that she didn't know that toilet paper is not sold in convenience stores.