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Ant Forest, a Chinese green initiative, has won the United Nations' highest environmental honor.

Another trend is the boom in new energy cars. Sales rose 61 percent in China last year, with more than one and a quarter million such cars being sold in the country.

Another notice released around the same time said that residents in a residential block nearby should abide by home-based isolation requirements as of 6 pm that day.

Another example of Amazon’s use of human knowledge to improve Alexa is a program unveiled last year called Alexa Answers.? A select group of customers invited to the program can go to a website to see a list of questions Alexa can’t answer today and provide information to fill in the blanks.

Apart from Shanghai, cities including Beijing, Chengdu and Shenyang have all organized a number of exhibitions and activities, showcasing their recent accomplishments in terms of innovation and entrepreneurship.