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Xi called on science and technology workers and space engineers in China to ride on the wave of the Chang'e-4 mission to achieve the general goal of China's lunar project, make more efforts to push forward the international aerospace cause and bring more Chinese wisdom, solutions and force to the peaceful use of space and the building of a community with a shared future for humanity.

Guangzhou-based China Southern operates a fleet of about 840 airplanes, ranking the first in Asia and third worldwide. It is China's largest air carrier with the largest passenger volume and air route network.

Teachers take shifts to water the ice rink every night in winter, said Ding Jianpei, principal of the school.

Liao said it was no easy job to buy the bus ticket back home during the festival. "I used to line up for hours at the station for tickets, and the prices often ticked up due to high demand."