Yan also gives psychological guidance to the children.
Yang, who was on a two-day visit to Washington, also met US Secretary of State Rex Tillerson on Thursday.
Ye Jinwu, founder and chairman of Hangzhou-based fintech company Ying Ying Group, said that Hangzhou still lags behind first-tier Chinese cities, such as Beijing and Shanghai, in terms of the size of its fintech industry.
Yang Jiechi, a member of the Political Bureau of the Communist Party of China (CPC) Central Committee and also director of the Office of the Foreign Affairs Commission of the CPC Central Committee, met with US national security advisor John Bolton at the White House.
Yang made the remarks at a seminar themed "New Era, Shared Future, New Opportunities: the China International Import Expo and the Belt and Road Initiative."
Yan Shuang, deputy head of the publicity department of the Shanghai Municipal Party Committee, read a letter from Li Qiang, the Party secretary of Shanghai, at the ceremony.
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Xu took the place of Wang Xiaodong, according to a statement issued by the State Council.
Yang expected China to see 3 percent GDP growth this year, saying the government needs to adopt more proactive fiscal policies and more flexible monetary policies as well as further deepening of reforms and opening-up to release new impetus for growth.
Yangpu, one of the key districts behind the city's drive to become a global innovation hub, is now shifting its focus from traditional heavy industries to cultural and creative industries.
Xueersi Online School, a subsidiary of leading Chinese education company TAL Education Group, has unveiled its latest online English learning products in response to strict policies regarding after-class institutions.