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"Global warming, land-based sewage, illegal fishing activities, wild multiplying of thorn starfish predators and too much tourism are threatening the coral reef ecosystems. My heart was broken seeing many of them turning white in response to stress," said Chen.

"HCQ will be used as a prophylactic to help defend Brazil's nurses, doctors and healthcare professionals against the virus. It will also be used as a therapeutic to treat Brazilians who become infected."

"Further studies into microbial pathogens such as bacteria and viruses and immunological antibodies are urgently required, to help validate saliva for future routine specimen collections, in this and future pandemics," Han said.

"Foreign investors ignore onshore trading opportunities at their peril," he said in an email.

"For both supply and demand, e-commerce is more direct and more convenient. It can be expected that cross-border e-commerce cooperation will become a highlight of China-New Zealand trade in the future."