2. It is illegal; Violation of the regulations on paying social security for employees.
3. It is illegal; Violated the 36-hour rule.
4. It is illegal; Violated the rules that overtime pay should be paid.
5. Not illegal; There is no legal requirement to provide working meals.
6. illegal; Unreasonable fines are a serious violation of employees' rights and interests, but it is not stipulated whether they must be signed by employees.
7. illegal; Payroll should be given.
8, illegal, in violation of the provisions of the relevant parties to the contract.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.