What are the types of street cleaners in Beijing? How do they usually get started?

The cleaners in Beijing belong to the Beijing Environmental Sanitation Group, but now there are national policies that stipulate that all these personnel are no longer part of the formal establishment. They are all dispatched through labor dispatch companies, and the labor contracts are also with the labor dispatch companies. Sign, Beijing Environmental Sanitation Group has its own labor dispatch company. Some cleaners are paid false wages because some departments falsely report the number of employees and then collect gray income from them.