Xitu was the Chinese designation for a historical region or a Chamic polity or kingdom that was first mentioned in the mid of fifth century AD, is believed to be one of the predecessors of Champa Kingdom. It has been proposed to be located in the Thu Bồn River Valley, present-day Quảng Nam Province, Central Vietnam.

Lâm Ấp was a kingdom located in central Vietnam that existed from around 192 AD to 629 AD in what is today central Vietnam, and was one of the earliest recorded Champa kingdoms. The name Linyi however had been employed by official Chinese histories from 192 to even 758 AD to describe a particular early Champa kingdom located north of the Hải Vân Pass. The ruins of its capital, the ancient city of Kandapurpura is now located in Long Tho Hill, 3 kilometers to the west of the city of Huế.