Artists from Bulgaria perform at Beijing International Tourism Expo 2019 in China National Convention Center in Beijing, capital of China, June 18, 2019. The three-day expo kicked off here on Tuesday. (Xinhua/Pan Xu)

A hostess poses with a visitor at Beijing International Tourism Expo 2019 in China National Convention Center in Beijing, capital of China, June 18, 2019. The three-day expo kicked off here on Tuesday. (Xinhua/Pan Xu)