How do Japanese dispatched workers obtain permanent residency in Japan?

Labor dispatch personnel are not allowed to apply for permanent residence, and must return home after three years of labor dispatch. To apply for permanent residence in Japan, you can apply for permanent residence if you have lived in Japan for 10 years and have a formal tax record of more than 5 years. (Becoming a full-time employee in a Japanese company, minimum bachelor degree), can't be a skill trainee (labor dispatch) or a formal job. Only after returning to China to marry a Japanese or a person with permanent residence status can you re-apply for coming to Japan.