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Companies should be responsible for riders' safety and also for the safety of users' personal information and their deposit, Yang said. They should work on improving online and offline operations, he said.

Colombo Port City was jointly developed by the Sri Lankan government and China's CHEC Port City Colombo Ltd. It is the country's largest foreign direct investment project and is expected to attract billions of US dollars in investments in the coming years.

Companies need to study the development of external markets, understand their competitors' strategies, assess the opportunities for employing AI in their own businesses, and they need to learn, observe and experiment with business application cases in various parts of the value chain, Karlberg said.

Coal has long been burned for heating in northern China, a practice that is blamed for the lingering winter smog. The 28 cities are those included in an action plan released by the ministry in August. The plan asked these cities to cut concentrations of PM2.5 - hazardous fine particulate matter with a diameter of less than 2.5 microns - by at least 15 percent year-on-year from October to March. Under the plan, 3 million households in the 28 cities will use electricity or gas for heating this winter, so massive reconstruction projects had started.

Commenting on some US politician's call for American companies to leave China, Stratford said he does not take it seriously.