导火索 (dǎo huǒ suǒ): Fuse / Spark (Noun) — Meaning & Stroke Order

The release of this report was the fuse that prompted the government to immediately revise its policy.

This price increase became the trigger, sparking dissatisfaction among consumers.

Could that failed negotiation have been the spark?

This incident was not the fuse, but rather the result of long-accumulated conflicts.