Thailand's King Maha Vajiralongkorn pays respect to former prime minister Prem Tinsulanonda, in Bangkok, Thailand, June 2, 2019. Thailand's former prime minister Prem Tinsulanonda died on May 26. King Maha Vajiralongkorn has ordered the Royal Palaces to mourn the death of Prem Tinsulanonda for 21 days. (Photo: Xinhua)