A single spark can start a prairie fire.

Metaphorically, small things can cause big changes.

It is also a metaphor that although new things are weak at first, they have broad development prospects.

Source: Shangshu Pan Geng: "If the fire is in the original, can it not be extinguished?"

For example: Zhang Hong's "The Flowers of Evil" 57th time "Don't underestimate. A spark can start a prairie fire, and I don't know how it will end. "

Extended data:

"A single spark can start a prairie fire" is a letter written by Mao Zedong to Lin Biao on 1930, in response to a letter from Lin Biao, asking for advice on how to estimate the future of the Red Army.

In this letter, Mao Zedong criticized Lin Biao and some comrades in the Party for their pessimistic thoughts about the current situation.

This letter further elaborated the theory that rural areas surrounded cities and armed forces seized power.

1948, Lin Biao proposed to the Central Committee that his name should not be mentioned when this letter was published publicly. Mao Zedong agrees with this opinion. When this letter was included in the first edition of this book, it was renamed "A single spark can start a prairie fire", and the content of criticizing Lin Biao by name was deleted.

References:

Baidu Encyclopedia-A single spark can start a prairie fire