A.D. 752 to 850 is not “ancient” but medieval in European terms. The first Carolingian king of the Franks, Pippin the Short, became king in 751. The Abbasid dynasty of caliphs took over in 750.
OTOH, what passes for the "middle ages" in China (Southern Song, perhaps Yuan dynasties) and Japan (Kamakura-jidai) doesn't begin until the 1100s, and the SE Asian civilization of the 800s, and even into the 1100s in modern-day Cambodia and Thailand, would be "ancient" by European standards, emulating more the Greco-Roman than the Carolingian-Byzantine era.