A historical region of southeast Asia on the Gulf of Tonkin, an arm of the South China Sea, now forming most of northern Vietnam.It was part of French Indochina from1887 to1946.

• 印度支那半岛东南亚的一个半岛，包括越南、老挝、柬埔寨、泰国、缅甸和马来西亚的大陆部分。