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Chen said, "The total population of third-tier cities is about six times that of first-tier ones now. In the future, lower-tier cities with bigger populations will definitely contribute more to consumption upgrading, as the number of consumers, their disposable income and confidence in spending have all been growing."

Chen's volunteer work finished when his wife gave birth and he's been adapting to the new role of being a dad.

Chen Fenjian, chairman of China Railway Construction Corp, one of the country's main railroad builders by sales revenue, said as the country plans to strengthen the support of the transportation network, including the construction of a multilevel rapid transportation network based on rail transit and expressways in city clusters and metropolitan areas, the expansion of metro networks is helpful to form new spaces to stimulate high-tech, retail, services and private sectors, as well as the exports of Chinese trains and construction projects.

Chen Weihua in Washington and Jiang Xueqing also contributed to this story.

Children from Beijing play drums at the summer camp staged in the capital by the Forbidden City Concert Hall. [Photo by Zou Hong/China Daily]