As a devoted admirer of the Yangtze finless porpoise, 65-year-old Yang He has been following the endangered species and has taken over 100,000 photos of them over the past five years.
Produced by Xinhua Global Service
您使用的瀏覽器版本較舊，已不再受支援。建議您更新瀏覽器版本，以獲得最佳使用體驗。
