Zhengyang Gate is located south of Tiananmen Square, visitors from home and abroad go through it all year round. But few people know that the Beijing swift is also one of the regular visitors to this particular place for over six hundred years. Watch this episode to find out more about this special "resident."

About 'Journeys in Nature': Summer in Beijing Series

In this series, we walk into the most green corners in Beijing, to explore the ecological evolution of some ancient parks and to get a closer look at some of the animal neighbors who share the same space with dwellers.

(If you want to contribute and have specific expertise, please contact us at nature@cgtn.com.)