Photo taken on April 15, 2019 shows mandarin ducks at Zhaolin Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)
Photo taken on April 15, 2019 shows mandarin ducks at Zhaolin Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)
Photo taken on April 15, 2019 shows mandarin ducks at Zhaolin Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)
Photo taken on April 15, 2019 shows mandarin ducks at Zhaolin Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)
Photo taken on April 15, 2019 shows mandarin ducks at Zhaolin Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)
Photo taken on April 15, 2019 shows mandarin ducks at Zhaolin Park in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)