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"Competition has become fierce," Wan said.

"Considering the gradual recovery curve and the recent global outbreaks in multiple countries,-which will hold back Chinese travelers' willingness to go abroad-the loss of airport retailing business during the whole epidemic period could be as high as nearly a quarter of the annual income of duty-free stores," Yu said.

"Chinese air cargo enterprises are still in an inferior position in terms of their international business when compared with other industrial giants, both in terms of network and distribution centers," said Lin Zhijie, an aviation industry analyst and columnist at carnoc.com, one of China's biggest civil aviation websites.

"Chinese mothers are increasingly becoming aware of health and wellness after the pandemic and are looking for products with proven health and immunity benefits," said Ryan.

"Coalbed methane, as an unconventional type of natural gas is recognized as clean energy," said Hao Pengcheng, a Shanxi-based engineer of PetroChina. "It is significant to Shanxi's energy revolution given its rich reserves and sophisticated exploitation system."