This classification is based on the economic development level, population size and urbanization level of the city. As a coastal city, Taizhou's economy has developed rapidly, especially in manufacturing, textile and chemical industries. The urbanization level of Taizhou is also constantly improving, and the supporting facilities such as transportation, medical care and education in urban areas are becoming more and more perfect. The number of permanent residents in Taizhou has also reached the standard of megacities, which further proves its status as a second-tier city.