Turkmenistan (Turkmen: Türkmenistan) is a landlocked country in southwestern Central Asia, bordered by the Caspian Sea to the west and Kazakhstan, Uzbekistan, Afghanistan and Iran to the north and southeast, respectively.

The Republic of Uzbekistan, commonly known as Uzbekistan, is a landlocked country located in Central Asia.

The Republic of Tajikistan, or Tajikistan for short, is one of the Central Asian countries, located between Afghanistan, Uzbekistan, Kyrgyzstan and the People’s Republic of China, and has the smallest land area among the Central Asian countries.

The Kyrgyz Republic, commonly known as Kyrgyzstan, is a landlocked country located in Central Asia. Kyrgyzstan is bordered by Kazakhstan to the north, Uzbekistan to the west, Tajikistan to the southwest, and China to the east.

The Republic of Kazakhstan, commonly known as Kazakhstan, is a transcontinental country, spanning both Europe and Asia, located mainly in northern Central Asia, with a small part of its territory west of the Urals River in Europe.

The Republic of Maldives, commonly known as the Maldives, is located about 500 km southwest of Sri Lanka and India in the waters of the Indian Ocean, and is part of the South Asian region.

The Democratic Socialist Republic of Sri Lanka, commonly known as Sri Lanka and before 1972 as Ceylon, is an island nation located off the southeast of the South Asian-Indian subcontinent and belongs to Asia.

The Islamic Republic of Pakistan, commonly known as Pakistan, is located in South Asia and has a physical control area of 881,913 square kilometers, bordered by India to the east, the Indian Ocean to the south, Iran to the west, Afghanistan to the northwest, and Xinjiang, China to the northeast.

The Republic of India, commonly known as India, is a country located in the Indian subcontinent of South Asia, the seventh largest in the world in terms of area, and the second largest in Asia, with approximately 3.16 million square kilometers of actual territory under its control.

The People’s Republic of Bangladesh, commonly known as Bangladesh, is a South Asian country located in the eastern part of Bangladesh, north of the Bay of Bengal; a small part of the southeastern mountainous region is bordered by Myanmar, while the rest of the country is bordered by India.