What is labor service method?

Are you referring to the way of going abroad?

Generally, the ways to go abroad for a long time can be divided into study abroad, immigration and labor service.

Labor refers to working abroad, but unlike skilled immigrants, labor abroad generally involves hard work, such as chefs, masseurs, waiters, etc. Skilled immigrants have certain academic qualifications (at least a bachelor's degree), have certain work experience, and perform irreplaceable technical or management jobs in large or even multinational enterprises.

Hope it helps!