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"China will firmly support related companies to safeguard their own legitimate rights and interests, and firmly uphold international economic and trade rules," he said at a news conference in Beijing.

"China's total logistics expenditure accounts for about 15 percent of its GDP. The smart logistics sector is a multitrillion market."

"Critics have an obligation to respond to what I said, not to create straw men to attack," he said.

"Chinese B2B companies today care more about their reputation and sustainable connection with partners and consumers in overseas markets. They are keen to transform their products into brands," said Cai, adding digital marketing methods are key to restoring their earning ability in a smart way.

"Coal-mine accidents are always accompanied with power failure. In this case, pneumatic machines can still work, helping workers respond to an emergency," Cui explained.