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"During the past week, warm air was very active, which caused a continuous temperature rise in central and eastern parts of China. However, as warm air moved northward, it met with the cold air in the central Siberian region on Thursday night, causing heavy rain and snow to occur," he said.

"Employers should avoid wasting useful resources like middle-aged and elderly labor force. Instead, they should keep, retrain and recruit older employees, and provide tailored and long-term opportunities to study, so that companies can fulfill their labor demand," he said.

"Decades ago, people often waited (or tried to wait) until marrying before having kids, having sex, or buying a home," said Bella Depaulo, a social scientist at the University of California, Santa Barbara. "Now those possibilities are readily available outside of marriage."

"Everything is hand-made, some with thin steel bars and others with fibre glass and galvanized wire, so it's been a very labor-intensive process. Social distancing meant we couldn't even work together in big groups, pieces had to be made in isolation and then brought together for assembly, but we're really pleased with how it's turned out and how it's been received."

"Effective policy communication, sound economic and trade relations and strong economic complementarity are favorable conditions for deepening China-Arab third-party market cooperation," it said.