Photo taken on May 28, 2019 shows visitors tour the exhibition area of China Unicom, one of the country's largest telecommunication carriers, during the 2019 China International Fair for Trade in Services. (Photo by Pang Zhengzheng/ People's Daily Online)

Photo taken on May 29, 2019 shows visitors at a smart living room prototype during the 2019 China International Fair for Trade in Services. (Photo by Chen Xiaogen/People's Daily Online)

Photo taken on May 28, 2019 shows a visitor appreciates gourds decorated with cloisonné, an ancient technique in China, during the 2019 China International Fair for Trade in Services. (Photo by Wang Zhen/People's Daily Online)

Photo taken on May 29, 2019 shows a visitor taking a selfie at the specially-designed exhibition area of Hong Kong during the 2019 China International Fair for Trade in Services. (Photo by Chen Xiaogen/People's Daily Online)