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"During the most severe period of COVID-19 in the first quarter and after the Chinese New Year, the top three airlines lost about 100 million yuan each per day. But since the second quarter, things have improved thanks to the effective measures to contain the contagion in China," said Chen Zhuo, a senior analyst with China Merchants Securities.

"Done well, there could be positive environmental outcomes for the island communities on the reefs (and could) safeguard the island communities well into the 22nd century," he said.

"Even for patients with rare diseases where therapies are available, standard family care is crucial to improving their quality of everyday life to the maximum, postponing disease development and extending life," said Ding Jie, vice-chairwoman of the Expert Committee of Diagnosis, Treatment and Security of Rare Diseases with the National Health Commission. Ding is also a professor of pediatrics at Peking University First Hospital.

"Drinking water from the same river, we, the LMC countries, are close as one family living in a community with a shared future. Enhancing mutually beneficial cooperation is both conducive to our own interests and contributes to others' success," Li said.

"Development of the saturation diving system will help the country handle emergencies in offshore rescues more quickly and effectively. Though China has successfully sent divers to as deep as 313.5 meters since 2014, there are several countries that have conducted saturation dives at depths beyond 400 meters," he said in a recent interview.