1. Overcapacity may have side effects, and discontinued enterprises may be revived;

2. Coking coal reserves are decreasing, and steel fuel may be monopolized;

3. Iron ore production has been oligopolized, iron and steel grain may be controlled;

4. The pressure of environmental protection is increasing, and the environmental investment of steel mills will be more and more large;

5. Users' quality requirements for steel are becoming more and more personalized, but the scale of steel mills is getting larger and larger, which may cause contradictions between scattered contracts and large-scale production.