1. Unbalanced economic development: Beijing-Tianjin-Hebei region is the core region of China's economic development. However, with the transformation and upgrading of China's economy, the decline of some traditional industries and the development of new industries may lead to the decrease of employment opportunities and the decrease of the population attracted.
2. High cost of living: The relatively high cost of living in Beijing, Tianjin and Hebei includes housing prices, education and medical care. It may make some people choose to leave these cities to find a place more suitable for their lives.
3. Environmental pollution: Environmental problems in Beijing-Tianjin-Hebei region have always been concerned, including air pollution and water pollution, which may affect people's quality of life and health, thus leading to population decline.
4. Urban planning and management: There are some problems in urban planning and management in Beijing-Tianjin-Hebei region, such as traffic congestion and over-investment in real estate, which may make some people feel uncomfortable and choose to leave these cities.
In short, the continuous population decline in Beijing-Tianjin-Hebei region reflects some problems and challenges faced by these cities, and effective measures are needed to promote economic development, improve the quality of life and improve the environment in order to attract more people to stay in these cities.