Migratory bird scouting is an important means of studying migratory bird migration routes and migration behavior. Since the 90s of the last century, researchers have been carrying out the Beijing Yuyan Huanzhi work at Kuoruting in the Summer Palace. This year, the Beijing Yuyan Huanzhi work marked a total of 107 swans, including 33 individuals from Xinhuanzhi, and re-captured 74 previously marked Swans.

Migratory bird scouting is an important means of studying migratory bird migration routes and migration behavior. Since the 90s of the last century, researchers have been carrying out the Beijing Yuyan Huanzhi work at Kuoruting in the Summer Palace. This year, the Beijing Yuyan Huanzhi work marked a total of 107 swans, including 33 individuals from Xinhuanzhi, and re-captured 74 previously marked Swans.