A printing factory was investigated for counterfeit trademarks, and both the boss and the workers were arrested. The workers didn’t know about it and didn’t get high wages. Why couldn’t they just let the ordinary workers go and they had to sign for arrest?

Is that factory a private company? If it is a private enterprise, the nature of the factory is an unincorporated business, which means that all legal employees in the company have certain connections with the enterprise. As for the intensity of punishment, it depends on each employee's position and relevance.