What does the Australian 457 visa mean?

Visa 457 is a business work visa valid for 4 years. Employers nominate overseas applicants and guarantee their work visas. Visa 457 was introduced by 1996 to meet the shortage of domestic labor market and the demand for specific talents.

At present, the 457 visa is not very dominant, after all, the cause of the global financial crisis is the main one. Investment immigration is still the first choice.

Australia has a small population, expensive labor force and relatively comfortable living environment, which is very suitable for living. After living there for more than four years, I was forced to return to China, but I still miss the pace and living environment there. What questions can we continue?