Why do Haila headlights always recruit people?

There are many temporary workers. Since 1899 produced the first automobile lamp, 100 has been synonymous with automobile lighting technology for many years. The company has a large production scale, few formal employees and many temporary workers. The longest working time of temporary workers is 2 months, and the turnover of personnel is large. Haila lamps need to recruit employees once a month to ensure the correct output.