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"For us, it brought us opportunities. As students and educators learned that there was a solution that would allow them to return to school quickly, even back to normal in the future, more interactive courses or teaching models that mixed with online and offline will be adopted by them," he said.

"Given most of our users are adults who have limited time for learning each day, we are scrambling to leverage more technologies to fill up their excess time," said Liu.

"For example, in big cities, people are willing to spend one month's salary on an iPhone," he said. "In small ones, they prefer mobile phone brands such as Oppo and Vivo, as they have good functions and designs but are relatively cheaper."

"Guan is suspected of illegal behaviors and has been sent to the supervisory commission for further investigation. We are following clues on corruption involving other customs officers," Dalian Customs said in a statement on Wednesday.

"Foreign markets now play a critical role in our overall development plan. They are envisioned as an important growth engine," said Chen Yuhong, chairman and CEO."Since we see huge rising demand from our overseas clients and partners, we are confident that it will grow to make up a bigger percentage of our revenue in the coming years," he said.