星星之火

a single spark (idiom); an insignificant cause can have a massive effect

star / heavenly body / satellite / small amount

star in the sky

(coll.) a star; the stars in the sky

(possessive particle, literary equivalent of 的[de5]) / him / her / it

fire / urgent / ammunition / fiery or flaming / internal heat (Chinese medicine) / hot (popular) / classifier for military units (old) / Kangxi radical 86

a single spark can start a huge blaze (idiom); an insignificant cause can have a massive effect