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"As the world's most populous nation, China has the demographic dividend for technological innovation," said Zhu Yanmei, chief human officer of the Shenzhen-based BGI, China's top gene-sequencing provider. "We can easily arrange an R&D team of more than 1,000 members in China, but it is not an easy task in other countries."

The First Family enjoyed a tea break, a stop at a relics conservation workshop and a Peking Opera performance at the Palace Museum, also known as the Forbidden City.

There are 3.29 million senior citizens in Beijing. According to Beijing Municipal Commission of Housing and Urban-Rural Development, more than 30,000 families of elderly people have benefited from the city's affordable housing programs.

Also on Wednesday, the SOA disclosed the findings of a nationwide survey on land-based sources of marine pollution, identifying a total of some 9,600 such sources, including about 740 rivers, 7,500 sewage outlets and 1,350 emergency flood outlets.

Li made the remarks while meeting with a Japanese delegation of more than 250 business leaders from major Japanese enterprises.