1. enrollment plan for instrument major: the enrollment plan for instrument major is one of the key factors that determine the difficulty of adjustment. If the enrollment plan of this major is full, the difficulty of adjustment will increase accordingly.

2. Degree of competition: The adjustment difficulty is also affected by the degree of competition in this major. If the degree of competition in this major is high, the difficulty of adjustment will increase accordingly.

3. Adjustment policy: Different universities and majors have different adjustment policies. Some universities and majors may have certain adjustment restrictions, which will affect the difficulty of adjustment.