抛砖引玉
Stratagems of Attacking · 攻战计Offer something of lesser value to obtain something greater. Use bait to draw out the enemy's valuable assets or information.
A Tang dynasty poet deliberately wrote a mediocre poem to provoke his talented friend into composing a superior one in response. The "brick" of the inferior verse drew out the "jade" of a masterpiece.
Wikipedia founders initially wrote thousands of "brick" articles themselves — mediocre stub entries that invited others to improve them. These imperfect starting points drew out expert contributors who threw "jade" — comprehensive, high-quality content.
Linus Torvalds released Linux as a minimal, imperfect kernel — a "brick." The open source community responded by contributing millions of lines of code — "jade." The initial offering of something free and incomplete attracted far greater value in return.