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"Columbia Gas is investigating what happened on its system today," NiSource spokesman Ken Stammen said.
"China's input on research and development rose to the second highest in the world in 2017," said Wan, adding that the number of full-time research and development personnel in China now ranks the highest in the world.
"Currently, we sell some 8 percent of our production to the Chinese market. We have been growing and we have a high-growth outlook," said Luzuriaga.
"Chinese companies not only look for profits for themselves. They also look for win-win results so that business could last," he said.
"Combating the virus is the common task of all humankind, and we must intensify the sharing of knowledge to cope with it," Wang Daowen, director of Tongji Hospital's cardiovascular department, said after a video conference with Italian counterparts on Wednesday night.