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Among its more than 5,000 employees, 800 are research and development staff. It produces more than 12,000 high-speed machining centers of various specifications every year, with annual output value exceeding 4 billion yuan (1 million).

Amazon’s other Kindle e-readers include the basic 6-inch Kindle (.99), Paperwhite (9.99) and Voyage (9.99). Some of those models can be made waterproof with third-party covers or other add-ons, but the new version of the Oasis has that feature from the get-go.

American Airlines said it will substitute other planes for MAX jets when possible and offer full refunds to passengers who are unable to make other travel arrangements if their flight is cancelled.

Amid the rising demand, steel output is also on the rise. Official data showed China's crude steel output went up 4.8 percent year-on-year to 76.7 million tons in April.

Amazon’s digital brain, Alexa, uses Wikipedia as one of many sources to answer questions. Amazon has previously said the Alexa team and the Wikimedia Foundation share a similar goal: making it easier to locate and share information.