A girl reacts in front of a big screen showing a tourism promotion video in the tourism services exhibition area of the 2020 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, Sept. 5, 2020. The CIFTIS runs on Sept. 4-9 in Beijing. (Xinhua/Cai Yang)

A girl reacts in front of a big screen showing a tourism promotion video in the tourism services exhibition area of the 2020 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, Sept. 5, 2020. The CIFTIS runs on Sept. 4-9 in Beijing. (Xinhua/Cai Yang)

A girl reacts in front of a big screen showing a tourism promotion video in the tourism services exhibition area of the 2020 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, Sept. 5, 2020. The CIFTIS runs on Sept. 4-9 in Beijing. (Xinhua/Cai Yang)

A girl reacts in front of a big screen showing a tourism promotion video in the tourism services exhibition area of the 2020 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, Sept. 5, 2020. The CIFTIS runs on Sept. 4-9 in Beijing. (Xinhua/Cai Yang)

A visitor takes photos in the tourism services exhibition area of the 2020 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, Sept. 5, 2020. The CIFTIS runs on Sept. 4-9 in Beijing. (Xinhua/Cai Yang)

Photo taken on Sept. 5, 2020 shows exhibits in the tourism services exhibition area of the 2020 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China. The CIFTIS runs on Sept. 4-9 in Beijing. (Xinhua/Cai Yang)

A visitor poses for photos in the tourism services exhibition area of the 2020 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, Sept. 5, 2020. The CIFTIS runs on Sept. 4-9 in Beijing. (Xinhua/Cai Yang)