Guess the answer to the 39th level of Gongshi Idioms on WeChat: What does a person cross a single-plank bridge?

Like walking on thin ice? [ rú lǚ bó bīng ]?

Basic meaning?

Ru: walk on, step on. Like walking on thin ice. It is a metaphor for acting with extreme caution and caution.

Source

"The Book of Songs·Xiaoya": "trembling with fear; as if facing an abyss; as if walking on thin ice."

Example sentences

This task relationship With the wealth and lives of thousands of people, how can we be the least bit careless?