Here's a study of the history of the Vietnamese language and its evolution from a fusion of ancient Chinese and proto-Viet-Muong. By professor John Phan of Columbia University, “Re-Imagining “Annam”: A New Analysis of Sino–Viet– Muong Linguistic Contact”: Columbia University - Academia.edu. read more
During the Vietnam War, the North Vietnamese and the Chinese had agreed to defer tackling their territorial issues until South Vietnam was defeated. These issues included the lack of delineation of Vietnam's territorial waters in the Gulf of Tonkin, and the question of sovereignty over the Paracel and Spratly Islands in the South China Sea. read more
Vietnam - Vietnam under Chinese rule: The history of the Vietnamese people during more than a millennium under Chinese rule reveals an evolution toward national identity, which apparently came about as the result of two related developments. read more