Let me add a few points:
1. Do you have any acquaintances who work in the it department? It is better to ask them, because they know the most real things, such as salary, welfare, work and rest time, the implementation of labor contracts and internal management.
2, external inquiry, know your customer source, which customers, customers as partners, can provide you with the company's integrity, product quality, after-sales service and other content.
3. Ask the neighbors. Neighbors can provide information about the history and size of the factory. A bystander can often give you a lot of information.