What countries are there in Indochina Peninsula?

One of the three peninsulas in South Asia. Formerly known as Indian zhina Peninsula (during the Anti-Japanese War, due to the discriminatory meaning of the word "zhina", patriotic overseas Chinese Mr. Chen Jiageng suggested changing the Chinese name to "Indo-China Peninsula"). Located between China and the South Asian subcontinent, bordering the Bay of Bengal, Andaman Sea and Malacca Strait in the west and the South China Sea in the Pacific Ocean in the east, it is a bridge between East Asia and the Islands.

Include Vietnam, Laos, Cambodia, Myanmar, Thailand, Singapore and western Malaysia.