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"China will encourage private forces to open online education institutions and will support internet firms to meet emerging education demands," the guideline said.

"Chinese major enterprises represented by the top 500 continue to post steady growth and see structural optimization," said Wang Zhongyu, president of the China Entrepreneur Association, the institute that released the latest top 500 list.

"Chinese companies used to lag far behind multinational pharmaceutical companies in vaccine development and production, but have been gaining ground fast in the past few years," Shi said.

"Considering the billions of doses needed, and the risk [of] falling at the back of a very long line for Western vaccines, the appeal of the Chinese vaccines is apparent," Taimur Baig, chief economist and managing director at DBS Group Research, said in a note to US business news channel CNBC.

"China's internet industry is ever-changing. I'm looking forward to seeing more eye-opening products and concepts at the conference," he said.