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Chairs in university classrooms ring easily.
Because the durability is reduced.

Chairs in university campuses are very intensive, especially those in fixed positions, which may provide students with more than 10 hours of service a day. Everyone's sitting posture, weight and sitting habits are different, which will have an impact on the chair and affect its durability.

You can use a thicker cushion and try to keep the correct sitting posture, which is not only beneficial to your health, but also protects the chair.