Aerial view of Heilongjiang Taiyangdao National Wetland Park

An aerial drone photo taken on June 4, 2024 shows people visiting Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows people visiting Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)

An aerial drone photo taken on June 4, 2024 shows a view of Heilongjiang Taiyangdao National Wetland Park and city view in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Song)