北京是中国的首都，也是全国政治、文化、科技和经济中心。作为一个历史悠久的城市，北京拥有丰富的人口资源。那么，究竟北京有多少人口呢？

截至2020年，北京市常住人口约2172万人。这个数字是根据户籍数据统计出来的，而实际居住在北京的人口可能更多。由于北京的发展机会和优质的教育资源，许多人选择迁往这座城市。

北京的人口数量并不仅仅受到本地居民的影响，还受到外来人口的影响。随着城市化进程的加速，越来越多的人慕名而来，寻找工作和发展机会。这些外来人口大多集中在城市的边缘地区，形成了许多新兴的社区。

北京的人口增长也面临着一些挑战和问题。首先，过度的人口密集导致了交通拥堵和环境污染等问题的加剧。其次，住房问题也是一个亟待解决的难题。因为北京市中心地区土地有限，房价居高不下，给人们提供了较少的居住选择。

为了解决这些问题，北京市政府采取了一系列措施。例如，引导人口分流到周边地区，鼓励发展京津冀一体化。此外，政府还加大了对公共交通和地铁的投资，以减轻交通压力。同时，推动城市绿化和环境保护，提升居住质量。

总之，北京是一个拥有庞大人口资源的城市。随着城市发展和各项政策的实施，人口数量也在逐步增长。北京市政府将继续努力解决人口问题，提供更好的生活条件和发展机会。

As of 2020, the permanent population of Beijing is about 21.72 million. This number is based on household registration data, and the actual population living in Beijing may be even higher. Due to the opportunities for development and access to quality education in Beijing, many people choose to migrate to the city.

The population of Beijing is not only influenced by local residents but also by migrants from other regions. With the acceleration of urbanization, more and more people are coming to Beijing in search of job opportunities. These migrants mostly settle in the outskirts of the city, forming many emerging communities.

The population growth in Beijing also faces challenges and issues. Firstly, the excessive population density has led to increased traffic congestion and environmental pollution. Secondly, housing is a pressing issue. Due to limited land in central areas of Beijing, housing prices remain high, providing fewer residential options for people.

To address these issues, the Beijing municipal government has implemented a series of measures. For example, they are guiding population distribution to surrounding areas and promoting the integrated development of Beijing, Tianjin, and Hebei. Additionally, the government is increasing investment in public transportation and subway systems to alleviate traffic pressure. At the same time, efforts are being made to promote urban greening and environmental protection to enhance the quality of living.

In conclusion, Beijing is a city with a large population resource. With the city's development and the implementation of various policies, the population continues to grow gradually. The Beijing municipal government will continue to work towards resolving population-related issues and providing better living conditions and development opportunities.