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"Corruption does exist in the sector, but most officials are hardworking and have self-discipline, otherwise the achievements wouldn't have been made," he said.

"China strongly stands against some out-of-the-region countries flexing their muscles and making provocations under the name of 'freedom of navigation and flight' that result in tensions," Wei said. 

"China's cooperation with Africa never interferes in the internal affairs of African countries and political conditions are never attached. Those are the principles we hold when dealing with Africa's debt problems. The label 'debt trap' cannot be handed to China," he said.

"Congressman Dingell died peacefully today at his home in Dearborn," the office of his wife, Congresswoman Debbie Dingell, said in a statement.

"Compared with other types of urban rail transportation, maglev trains are quiet and can achieve high speeds because they don't actually ride on the rails with wheels but hover centimeters above the track through the use of magnets, avoiding the slower speeds caused by friction," said Sun Fuquan, a researcher at the Chinese Academy of Science and Technology for Development in Beijing.