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"Europe needs to maintain its own course," the BDI said, adding that the European Union would decide independently which companies it would allow to build 5G network infrastructure.

"Entering the electrified vehicle segment is a challenge for traditional carmakers, especially in terms of marketing. It is something we are still learning. We have a lot to learn from new players, including Tesla and Nio," Lu said.

"Despite lacking a mature value chain, that lower-frequency band will cover a larger area and offer continuous network coverage."

"Do not be flip when it comes to your important relationships," the scholars warned.

"Despite a late start, China has made rapid progress in hydrogen development, mastering core technologies of the hydrogen fuel cell," said Zhang Qingjie, president of Wuhan University of Technology.