待诏

待诏	dài zhào	expert in a specialized field such as medicine, divination or chess, available on call to the emperor (in the Tang and Song dynasties)
待	dāi	to stay; to remain
待	dài	to wait / to treat / to deal with / to need / going to (do sth) / about to / intending to
诏	zhào	(literary) to admonish / (bound form) imperial edict