Hǎo de biāotí wǎngwǎng néng tànlí-dézhū de gàikuò quánwén.
A good headline can often capture the essence of the entire article.
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history
From 《庄子·列御寇》: a poor man dives into a deep pool and retrieves a priceless pearl from beneath a sleeping black dragon (骊龙). His father warns him he was lucky the dragon was asleep. The story originally meant 'taking great risk for great reward' - over time it shifted to mean grasping the most essential point.
usage
Now mostly literary - used to praise writing, criticism, or analysis that cuts straight to the heart of the matter. Compare 一针见血 'pierce to blood with one needle', which is more colloquial.
