Chinese passengers are welcomed by Thai officials at the Suvarnabhumi Airport in Samut Prakan, Thailand, Jan. 9, 2022. Thailand on Monday welcomed the arrival of thousands of Chinese tourists in its capital of Bangkok, the first group following China's optimization of COVID-19 strategy which took effect on Jan. 8.(Photo: Xinhua)

Chinese passengers are welcomed by Thai officials at the Suvarnabhumi Airport in Samut Prakan, Thailand, Jan. 9, 2022. Thailand on Monday welcomed the arrival of thousands of Chinese tourists in its capital of Bangkok, the first group following China’s optimization of COVID-19 strategy which took effect on Jan. 8.(Photo: Xinhua)