People pass by a building in the Ancient Town of Luang Prabang, Laos, on Dec. 26, 2019. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

A fisherman sits in a boat on the Mekong River in Luang Prabang, Laos, on Jan. 3, 2020. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

Travelers take photos of the city scenery from top of a mountain in Luang Prabang, Laos, on Jan. 22, 2013. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

A customer selects chili at a market in Luang Prabang, Laos, on Oct. 7, 2020. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

Travelers take photos in front of a temple in Luang Prabang, Laos, on Oct. 7, 2020. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

Photo taken on Oct. 14, 2019 shows a temple in Luang Prabang, Laos. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

People sit at a cafe in Luang Prabang, Laos, on Dec. 26, 2019. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

People pose for photos during the Boun Lai Heua Fai Festival in Luang Prabang, Laos, on Oct. 3, 2020. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

Photo taken on April 15, 2019 shows the scene of the Lao New Year parade in Luang Prabang, Laos. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)

Photo taken on Jan. 2, 2020 shows the scenery of the Luang Prabang Ancient Town in Laos. Dwelt in lush jungle that surrounds the historical royal settlement, Luang Prabang, located aside the Mekong River, is known for French-Lao architecture and splendid Buddhist temples. Luang Prabang was listed by United Nations Educational, Scientific and Cultural Organization (UNESCO) as a world heritage in 1995. (Photo by Kaikeo Saiyasane/Xinhua)