In the VPC system, a mission statement is a document that guides students in various research and learning activities such as thesis, course design, and internship report. For archiving and maintaining the consistency of the assignment letter, the following is recommended:

1. The assignment letter in the VPC system should be the latest and most accurate version, and it should be updated and revised in a timely manner to ensure the accuracy and completeness of the assignment letter.

2. The task book on file should be consistent with the task book in the VPC system for review and evaluation by the school or teachers. If there are modifications or changes in the mission statement, the archived mission statement should be updated in a timely manner.

3. If there is any inconsistency between the mission statement in the VPC system and the archived mission statement, the archived mission statement should take precedence in order to avoid any unnecessary impact on the students' research and learning activities.

4. In order to ensure the accuracy and completeness of the mission statement, teachers should review and proofread the mission statement carefully when writing it to ensure that it does not contain errors or contradictions.