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"Encouraging street markets and mobile vendors is necessary to increase employment. For those who have jobs, starting street market businesses also helps in generating more income at lower costs. However, it is also important for local governments to roll out regulations to ensure security and hygiene," Wei said.

"During the Spring Festival in 2018, housing prices in first and second-tier cities suddenly increased, triggering price rises in lower-tier ones too," said Zhang. "Back then, buying properties in one's lower-tier hometown became a trend."

"Either China is going to write the rules on 21st century trade or we are," Biden said.

"Development is like riding a bike: you cannot stand still because you will fall," Yang Shaolin, managing director of the World Bank, said at the same forum on Friday. "Continued reforms are needed."

"Effective wireless communications will be essential to deliver the best services for society and business in emerging smart cities," said Yi Zhiling, chief scientist for wireless technologies at the China Mobile Research Institute.