A. This is a sitting posture corrector specially designed for students and adults, which is used to prevent hunchback and correct sitting postures. It has intelligent functions and can effectively help users improve their bad sitting posture habits. B. In terms of design, it has been carefully considered to meet the physical needs of users. Wearers will feel comfortable without excessive restraint, and it will not affect normal study and life when in use. C. In terms of usage scenarios, both children and adults are prone to slouching when sitting for long periods in daily study and work. This sitting posture corrector can play an important role. It can continuously remind and help people maintain correct sitting postures, prevent and correct hunchback problems, and have a positive impact on physical health and the cultivation of good postures. D. This sitting posture corrector is widely sold, covering regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and has been well - received by consumers in different regions.