China has the longest combined land border in the world, measuring  from the mouth of the Yalu River (Amnok River) to the Gulf of Tonkin. China borders 14 nations and extends across much of East Asia, bordering Vietnam, Laos, and Myanmar (Burma) in Southeast Asia; India, Bhutan, Nepal, Afghanistan, and Pakistan in South Asia; Tajikistan, Kyrgyzstan and Kazakhstan in Central Asia; and Russia, Mongolia, and North Korea in Inner Asia and Northeast Asia. Additionally, China shares maritime boundaries with South Korea, Japan, Vietnam, and the Philippines.