Volunteers and robot "Hai Hai"－which means "sea" in Chinese－welcome guests at the media center of the Shanghai Cooperation Organization's Qingdao Summit in the coastal city in Shandong province, June 3, 2018. The media center is scheduled to open on Wednesday. Several hundred volunteers from four colleges in Qingdao have taken their posts after three months of training. [Photo/Xinhua]

Photo taken on June 3, 2018 shows the interview room for television at the media center of the 18th Shanghai Cooperation Organization (SCO) Summit in Qingdao, East China's Shandong province. [Photo/Xinhua]

Aerial photo shows the media center of the 18th Shanghai Cooperation Organization (SCO) Summit in Qingdao, East China's Shandong province, June 3, 2018. [Photo/Xinhua]