The fact that the children gather in groups also has raised concerns that pods could transmit the coronavirus.
The expert also said the formal inclusion of China's A shares in June could open doors for foreign investors with increasingly more opportunities in China.
The evolution of the weight of the Chinese economy can also be assessed based on trade data, as China's share of total world trade expanded from 0.8 percent in 1978 to 11.8 percent in 2018, the report said, citing figures of the World Trade Organization (WTO).
The figure is 83.5 million kg or 0.2 percent higher than last year.
The fake milk powder has been withdrawn from the store, he said.
The exhibition will last until November 3 at the National Art Museum of China.
沈阳网站排名优化
The event's website says "weapons of any kind are prohibited".
The expo, which runs until Oct 7, has attracted more than 110 countries and international organizations, as well as 120 nongovernmental organizations and provincial or local exhibitions.
The exercise will follow the 18th SCO Summit, scheduled for June 9 and 10 in Qingdao, Shandong province.
The express railway, a direct line for freight that was launched in 2013 to connect Chengdu to Europe, has eliminated the geographic disadvantages of Chengdu as a landlocked city and transformed the city into an important logistics hub and economic exchange center between Europe and western China.