Which southeast Asian nation is bordered by Cambodia, Laos, China, and the South China Sea?

Vietnam is the Southeast Asian Nation bordered by Cambodia, Laos, China, and the South China Sea.

Vietnam stretches over a total length of 1,600 kilometers along the eastern coast of lower India. It is bordered by the South China Sea and Gulf of Tonkin in its northern part. China is its border in the North while Laos and Cambodia are its borders in the west.