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"Driving all the day is so tiring. If cars can drive themselves in line with rules, then traffic accidents may be reduced and efficiency can be improved," he said.

"Even though I'm tired sometimes because of the long distance, I enjoy cleaning the environment of the Great Wall and telling visitors of the importance of protecting a world heritage relic," he said.

"Demand from the cargo freight market has also dropped, but the declining volume is much less than commercial flights. Now, most airlines are carrying out belly-hold operations to transport medical supplies, and it will help to lift revenues. But the limited number of flights and freight volumes won't help much with profit-making," Lin said.

"Even though supervision has been bolstered and the number of bikes is decreasing, there is still robust market demand. Startups could avoid the dilemma that Ofo faced through rational management."

"External factors will also help, such as US Federal Reserve's patience on future rate increases and signs of mitigating trade conflicts."