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"China Baowu is not only China's largest steel-maker, but also a pioneer in state-of-the-art technology application. Exploring the possibilities of yuan-denominated settlement via blockchain is a new proof," said Zhang.

"China hopes, its seems, to play a critical role in ensuring that the talks between Trump and Kim will reach a satisfactory agreement and to avoid a failure of the talks in May that might in turn increase the risk of military action," said John Nilsson-Wright, a senior research fellow for Northeast Asia at the think tank Chatham House.

"By December we could ... begin vaccination," a development he described as "very important, because it would allow us to vaccinate vulnerable sectors in Argentina."

"China is ahead of the rest of the world in terms of application innovations in many sectors, including financial, retailing and e-commerce," said Sanjay Poonen, chief operating officer of VMware, in an interview with China Daily.

"China has multiple landforms including plateaus, mountainous regions and plains, so the helicopter must be able to operate in every landform. Foreign helicopters have not met our needs, especially those in plateaus and mountains," he said.