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Before that, whale food was spread out and relatively easy to get at. Now, there are giant buffets amid hundreds of kilometers of whale-food deserts. That's why you can see lots of whales in the summer in California's Monterey Bay, Slater said.

Before this can be achieved, a number of problems including complicated road conditions, technological bottlenecks, operating costs and supervision need to be dealt with, said Yang, adding that related rules and regulations have yet to be issued.

Before 2018, there were few study lounges in China, and that too mainly in some first-and second-tier cities such as Guangzhou, Suzhou and Tianjin. In Beijing, the first study lounge opened in 2018. Yet by 2019, study lounges had become popular nationwide thanks to the wave of sharing economy.

Beijing-Tianjin-Hebei synergy set to sustain industrial growth in the region

Behind these figures are the improved lives of local people.