Searching for parking spaces has long been a headache for many office workers in metropolises across China.
For the purposes of the survey, single young people are defined as single people living and working independently in metropolises with fixed accommodations.
Commuter rails are a service that primarily operates between city centers and suburbs of major metropolises.
Office blocks homes and hotels decked from top to toe in a verdant blaze of shrubbery and plant life; a breath of fresh air for metropolises that are choking on a toxic diet of fumes and dust.
Even so, this population chooses to live in big cities, as they are attracted to the opportunities in such metropolises.
Wang Boqing, founder of MyCOS and an expert in college graduate employment, said although metropolises are still top choices for graduates to work in, the past three years have seen more university and college students work in prefecture-level cities, or even smaller cities, suggesting more are choosing to avoid the pressure of big cities.
In the cramped metropolises of East Asia, brown toy poodles have become the latest must-have accessory.
However, topics related to public security are popular on Wechat accounts in the three metropolises.
It is already taking place between the big metropolises in Europe.
By 2015, more than 190 cities were undergoing preparations to join the system, including all four metropolises and 90 percent of provincial capitals, covering more than 700 million people.
According to him, Beijing is usually crowded and busy, but also convenient and open like all the other international metropolises.
Although travelers can try dishes from around China and the globe in renowned food cities Beijing and Shanghai, it is outside these major metropolises where a world of exciting Chinese cuisine awaits the true foodie.
