People parade during the celebration marking Thai King Maha Vajiralongkorn's birthday in Bangkok, Thailand, on July 28, 2018. Thai officials and the general public joined to mark King Maha Vajiralongkorn's 66th birthday on Saturday. (Xinhua/Rachen Sageamsak)

People light candles during the celebration marking Thai King Maha Vajiralongkorn's birthday in Bangkok, Thailand, on July 28, 2018. Thai officials and the general public joined to mark King Maha Vajiralongkorn's 66th birthday on Saturday. (Xinhua/Rachen Sageamsak)

People parade during the celebration marking Thai King Maha Vajiralongkorn's birthday in Bangkok, Thailand, on July 28, 2018. Thai officials and the general public joined to mark King Maha Vajiralongkorn's 66th birthday on Saturday. (Xinhua/Rachen Sageamsak)

People light candles during the celebration marking Thai King Maha Vajiralongkorn's birthday in Bangkok, Thailand, on July 28, 2018. Thai officials and the general public joined to mark King Maha Vajiralongkorn's 66th birthday on Saturday. (Xinhua/Rachen Sageamsak)