The Lao People's Democratic Republic (hereinafter referred to as Laos) covers an area of 236800 square kilometers. With a population of 7.06 million (2018), it is divided into 50 ethnic groups, including Lao Thai, mon Khmer, Miao Yao and Han Tibetan, collectively referred to as the Lao nation. Most residents believe in Buddhism. There are about 30000 overseas Chinese. The official language is Lao.