A tourist picks souvenir at a shop at Chiang Khan town in Loei Province, Thailand, July 7, 2019. Loei Province, 520 kilometers from Bangkok, is located on the bank of the Mekong River along the Phetchabun mountain range. (Photo: Xinhua)

 

Photo taken on July 7, 2019 shows a Thai style hotel at Chiang Khan town in Loei Province, Thailand. Loei Province, 520 kilometers from Bangkok, is located on the bank of the Mekong River along the Phetchabun mountain range. (Photo: Xinhua)

Photo taken on July 7, 2019 shows the Phu Pa Po mountain in Loei Province, Thailand. Loei Province, 520 kilometers from Bangkok, is located on the bank of the Mekong River along the Phetchabun mountain range. (Photo: Xinhua)

Tourists rest at a viewpoint of Phu Pa Po mountain in Loei Province, Thailand, July 7, 2019. Loei Province, 520 kilometers from Bangkok, is located on the bank of the Mekong River along the Phetchabun mountain range. (Photo: Xinhua)

Tourists visit Mekong River at Chiang Khan town in Loei Province, Thailand, July 7, 2019. Loei Province, 520 kilometers from Bangkok, is located on the bank of the Mekong River along the Phetchabun mountain range. (Photo: Xinhua)

Tourists visit the Mekong River at Chiang Khan town in Loei Province, Thailand, July 7, 2019. Loei Province, 520 kilometers from Bangkok, is located on the bank of the Mekong River along the Phetchabun mountain range. (Photo: Xinhua)