啟事

announcement (written, on billboard, letter, newspaper or website) / to post information / a notice

matter / thing / item / work / affair / CL:件[jian4],樁|桩[zhuang1],回[hui2]

Qi son of Yu the Great 禹[Yu3], reported founder of the Xia Dynasty 夏朝[Xia4 Chao2] (c. 2070-c. 1600 BC)

to open / to start / to initiate / to enlighten or awaken / to state / to inform