China, officially known as the People's Republic of China, is the most populous country in the world with over 1.4 billion inhabitants.

Mongolia is known for its vast, rugged expanses and nomadic culture.

Đại Việt was a historical kingdom located in what is now modern Vietnam.

Bhutan is a landlocked country in the Eastern Himalayas, bordered by China and India.

Laos, located in the heart of the Indochinese peninsula, is known for its mountainous terrain, scenic rivers and an abundance of wildlife.

Bangladesh, officially known as the People's Republic of Bangladesh is located in South Asia. It's bordered by India on all sides except for a small border with Myanmar.

Taiwan, officially called the Republic of China, is an island nation located in the Pacific Ocean.

North Korea, officially known as the Democratic People's Republic of Korea (DPRK), is a country in East Asia constituting the northern part of the Korean Peninsula.