1. Resource cost: Training institutions need to invest a lot of teaching resources, including teachers' manpower, teaching materials and equipment, etc. Collecting training fees can help institutions cover these costs and ensure high-quality training services.

2. Advantages of teachers and courses: Taicang Sino-German may have excellent teachers and special courses, and these resources may be relatively scarce and of high value. Collecting training fees can ensure the maintenance of teachers and course quality, and continue to provide high-quality teaching services.

3. Management and operation expenses: Taicang Sino-German, as a training institution, needs to bear management and operation expenses, such as rent, facility maintenance, administrative staff salaries, etc. Collecting training fees can help institutions maintain normal operations and continue to provide teaching services.