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"Exhibits from my institute have the cutting-edge technologies in this field and represent China's overall capability in electronics," he said. "Only a handful of nations, such as the United States, France and Israel, are able to develop such technologies and make advanced radars. It's fair to say we are a leader in this field."

"Despite trade war uncertainties, we're positive and confident that we can utilize the technology and innovation to do business with our partners in Canada," Tang said.

"During the epidemic, the public spends longer time on phones and computers, and gets excessive eye fatigue. We should pay attention and protect our eyes," he said.

"Each drone carries 20 kilograms of herbicides and can spray more than half a hectare in 10 minutes," said Gong, adding that it used to take a whole day to manually spray 1.33 hectares of farmland.

"EVs are also more concentrated in eastern coastal provinces, and that's why Beijing and Shanghai are leading V2G trails, while other provinces either do not have a large fleet size nor the pain of evening power demand peak," Kou said.