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Big waves crash on the shore of South Korea's southern resort island of Jeju on Oct 2, 2019, as Typhoon Mitag approaches the country. [Photo/VCG]

Big data and AI are two main technological innovations that the Beijing-based company uses in its platform, which digitalizes and personalizes English education.

Blackboard, a 20-year-old company, and 10-year-old Canvas, are other popular learning management systems used by US colleges. Teachers can post assignments resources on them in order to foster discussion. Other teaching tools include video conferencing to conduct classes and lectures.

Boeing is expected to ask the court to move the cases out of the US and to the nation where the crashes occurred or families of the victims reside. There were no US citizens aboard the Lion Air flight, but there were eight US citizens aboard the Ethiopian Airlines flight.

Bolivia relies heavily on the mining and sales of natural gas, but a sharp decline in those exports to its main buyers in the region and the plunge in international prices of oil and gas have created challenges.