謹啟

to respectfully inform (used at the beginning or end of letters)

cautious / careful / solemnly / sincerely (formal)

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