According to the policy I understand, the evaluation of teachers' professional titles is a process of comprehensive evaluation based on factors such as teachers' academic qualifications, teaching experience and teaching contribution. Professional title evaluation generally needs to submit certain materials for evaluation and defense. The fees for professional title evaluation are generally paid by teachers themselves.

However, the specific amount of fees shall be stipulated by local education departments or professional title evaluation institutions according to the actual situation. I don't know the specific charging standard of Xianyang, so I can't judge whether the charge of 1200 yuan is reasonable. I suggest you consult the education department or relevant institutions in Xianyang to understand their charging policies and standards.