少之又少 Origin — Chinese Character Wiki

shǎozhīyòushǎo

very few

少 shǎo adjectiveadverb

few

few; little; small in amount; less than
之 zhī particle

[intensifier]

Used between a subject and a following adjective to emphasize the degree or extent of a quality.
又 yòu adverbconjunction

and

Moreover; additionally; indicates a further step in meaning or an addition to a range
少 shǎo adjectiveadverb

few

few; little; small in amount; less than