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Beijing's old-age dependency ratio was 44.3 percent last year, which means every 2.3 working-age people in Beijing were supporting one senior citizen. The city also registered 1,046 centenarians as of the end of 2019, exceeding 1,000 for the first time, the report read.

Beijing's contribution

Before the drug was available on the Chinese mainland, there was little effective therapy for the disease, and patients depended mainly on treatment such as respiratory and nutrition supports, said Xiong Hui, Beijing Medical Association rare disease committee member and Peking University First Hospital deputy director of pediatrics.

Beijing-based Perfect World is one of the first Chinese game companies to mainly target overseas markets. It began setting up its overseas studios in major Western markets such as the United States and France about nine years ago to integrate its overseas resources and, more importantly, to communicate Chinese culture, said Xiao Hong, chief executive officer of Perfect World.

Because of the special shape and size of the expo venue, visitors can easily get lost at the 1.47 million-square-meter megastructure, and signs, though helpful, may not offer accurate guidance, neither can the traditional positioning resolutions such as GPS and Wi-Fi in such a complicated environment, said Liu.