title: Geography of Vietnam
context: Vietnam is located on the eastern margin of the Indochinese peninsula and occupies about 331,211.6 square kilometers, of which about 25% was under cultivation in 1987. It borders the Gulf of Thailand, Gulf of Tonkin, and Pacific Ocean, along with China, Laos, and Cambodia. The S-shaped country has a north-to-south distance of 1,650 kilometers and is about 50 kilometers wide at the narrowest point. With a coastline of 3,260 kilometers, excluding islands, Vietnam claims 12 nautical miles (22.2km; 13.8mi) as the limit of its territorial waters, an additional 12 nautical miles (22.2km; 13.8mi) as a contiguous customs and security zone, and 200 nautical miles (370.4km; 230.2mi) as an exclusive economic zone.
question: What countries border Vietnam?
answers: China, Laos, and Cambodia