history
Sourced from Cao Zhi's 《与杨德祖书》 (Letter to Yang Dezu, 3rd century): although unable to hide writings on a famous mountain, he would pass them on to those of like mind (同好).
usage
Most often used about collectors, hobbyists, or scholars finally opening up a private collection or knowledge to others with the same passion. Carries a generous, refined tone.
