The industry with relatively large development space in Tianjin is the glasses manufacturing industry. According to some statistics in China, 90% of the 42-year-old middle-aged and elderly people need glasses, and 80% of college students also need glasses. Tianjin has also formed a strong production base of glasses industry, which is one of the best in both quality and appearance. The profit of the glasses industry is also calculated in multiples, and there is a lot of room for development.