People walk outside the Grand Palace in Bangkok, Thailand, March 8, 2020. The number of tourist arrivals into Thailand is estimated to fall by 6 million this year to 33.8 million, the lowest in four years, said the Tourism Authority of Thailand (TAT) in a press briefing recently. (Xinhua/Zhang Keren)

A guard stands on duty at the tourists' entrance to the Grand Palace in Bangkok, Thailand, March 8, 2020. The number of tourist arrivals into Thailand is estimated to fall by 6 million this year to 33.8 million, the lowest in four years, said the Tourism Authority of Thailand (TAT) in a press briefing recently. (Xinhua/Zhang Keren)

People wearing masks visit the Asiatique night market in Bangkok, Thailand, March 7, 2020. The number of tourist arrivals into Thailand is estimated to fall by 6 million this year to 33.8 million, the lowest in four years, said the Tourism Authority of Thailand (TAT) in a press briefing recently. (Xinhua/Zhang Keren)

People walk outside the Grand Palace in Bangkok, Thailand, March 8, 2020. The number of tourist arrivals into Thailand is estimated to fall by 6 million this year to 33.8 million, the lowest in four years, said the Tourism Authority of Thailand (TAT) in a press briefing recently. (Xinhua/Zhang Keren)

People walk outside the Grand Palace in Bangkok, Thailand, March 8, 2020. The number of tourist arrivals into Thailand is estimated to fall by 6 million this year to 33.8 million, the lowest in four years, said the Tourism Authority of Thailand (TAT) in a press briefing recently. (Xinhua/Zhang Keren)

A woman wearing a mask is seen at a restaurant of the Asiatique night market in Bangkok, Thailand, March 7, 2020. The number of tourist arrivals into Thailand is estimated to fall by 6 million this year to 33.8 million, the lowest in four years, said the Tourism Authority of Thailand (TAT) in a press briefing recently. (Xinhua/Zhang Keren)

A woman walks outside the Grand Palace in Bangkok, Thailand, March 8, 2020. The number of tourist arrivals into Thailand is estimated to fall by 6 million this year to 33.8 million, the lowest in four years, said the Tourism Authority of Thailand (TAT) in a press briefing recently. (Xinhua/Zhang Keren)

A man wearing a mask visits the Asiatique night market in Bangkok, Thailand, March 7, 2020. The number of tourist arrivals into Thailand is estimated to fall by 6 million this year to 33.8 million, the lowest in four years, said the Tourism Authority of Thailand (TAT) in a press briefing recently. (Xinhua/Zhang Keren)