Why don't many factories in Kunshan recruit people?

Many factories in Kunshan don't recruit people, because they don't need so many people. During the internship in colleges and universities, it is normal that there are a large number of interns in the factory who don't want anyone. Kunshan is a county-level city under the jurisdiction of Jiangsu Province, which is under the management of Suzhou City. It has a history of more than 2,200 years since Qin established the county. Kunshan is the birthplace of Kunqu Opera, the ancestor of hundred operas. Kunshan also has many large, medium and small factories.