I worked in a heating enterprise for five years, but I didn't get in twice. Is it necessary to continue working?

Since you have worked in this enterprise for five years, you should be familiar with the employees inside. You can go directly to the personnel department and ask why you don't apply, indicating that you really want to stay. You don't know where the problem is and where the gap is. Let the personnel give some advice and give directions to improve these aspects. Your attitude must be sincere, and you will know the gap in your heart. If you don't continue, it depends on whether you can meet their requirements.