rewrite, tone needs to be friedly, less straight forward:

Dear Professor [Name],

I hope this message finds you well.

First and foremost, I would like to sincerely thank you for your dedication and support towards the school over the past period. Regarding the recent discussions about work arrangements, we would like to further clarify the matters to ensure mutual understanding:

Teaching Work Arrangements
The school has developed its teaching plan in strict accordance with the requirements of the Education Bureau (approximately 39 weeks per year). Winter and summer camps, market activities, and professional training are all part of the teacher's job responsibilities. To ensure a smooth start to the new semester, coordinating an early return to school for teaching preparations is a reasonable work arrangement, and it reflects our responsibility to the school, students, and parents.

Market Activities
Weekend market activities are an important way for the school to expand its student base (primarily targeting parents, which is common practice in the education industry). We fully understand the workload of teachers and have optimized the division of labor through team collaboration. For example, Teacher Ty is responsible for the English Business Day and the New Year activities at Wenlixue; Mery, Domi, and Wendy handle the Magic Concert; the Longge project is managed by all the Chinese class teachers. Should there be any changes in the future, we will prioritize discussing them with you.

The Purpose of the 90-Day Notice Period
The buffer period was established to ensure the stability of the teaching team and to prevent course transitions from being impacted by personnel changes. This arrangement is both for the operational stability of the school and for the benefit of the students currently enrolled.

Explanation Regarding Position Adjustment
The decision not to hire your recommended candidate is due to adjustments in the enrollment scale in recent years (which falls under the "major change in objective circumstances" as per Article 40 of the Labor Contract Law). This decision was made based on the overall assessment of the staffing needs, and it is unrelated to the candidate’s individual performance. We always adhere to the principle of fairness when evaluating all candidates.

Performance Bonus Evaluation Mechanism
The performance-based bonus is determined by a comprehensive evaluation of contract fulfillment, teaching results, and participation in market activities (consistent with the evaluation standards for Chinese teachers), with the aim of encouraging team growth. Specific details can be further discussed during the contract renewal process.

Progress of Contract Renewal Negotiations
The school began the contract renewal negotiations on January 3, 2025, and has allocated a full month for discussions. Setting a response deadline is intended to ensure the stability of teaching arrangements. Failure to confirm by the deadline will be interpreted as a forfeiture of the priority for renewal. Please rest assured, we value your professional abilities and will continue to maintain open communication via email or meetings.

We deeply appreciate the value you bring to the school and look forward to continuing our collaboration in the future. Should you have any questions, please feel free to visit the school or contact us at [contact information] for further discussion.

Wishing you all the best in your work.