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"Dressed in protection suits, we couldn't wear a thick down jacket, only a sweater and a shirt in temperatures of about -20 C," Hu said.

"Each train is currently managed by different logistic companies, which sometimes leads to empty carriages and a waste of resources," said Yuan Jiangwei, a Urumqi customs office official.

"Even if the lock is scram-bled, techniques to unlock the bikes are widely circulat-ed online and can be easily mastered by children," he added.

"Equally critically, policymakers need to foster stronger potential growth by boosting human capital, removing barriers to investments, and promoting trade integration within a rules-based multilateral system," the report said.

"During festivals in the second half of the year, pricier chocolate in gift packaging will see more sales," said Xue.