Geographically, what makes Beijing a capital and a megacity?

Beijing is located in the North China Plain, with flat terrain, fertile soil, high temperature and rainy summer, which is beneficial to agricultural development.

Beijing has a long history and is a famous historical and cultural city with rich tourism resources.

Convenient transportation, developed science and technology, developed service industry and tourism.

As the capital, the function of the capital attracts a large number of outstanding talents.