A bird is seen on a flowering tree at Changyangou Village of Wanzhai Township in Xuan'en County, central China's Hubei Province, March 14, 2019. (Photos: Xinhua)

A bird is seen on a flowering tree at a scenic spot in Wuxi, east China's Jiangsu Province, March 14, 2019.

A bird is seen on a flowering tree at Changyangou Village of Wanzhai Township in Xuan'en County, central China's Hubei Province, March 14, 2019.

A bird is seen on a flowering tree at Changyangou Village of Wanzhai Township in Xuan'en County, central China's Hubei Province, March 14, 2019.

A bird is seen on a flowering tree at Changyangou Village of Wanzhai Township in Xuan'en County, central China's Hubei Province, March 14, 2019.

A bird is seen on a flowering tree at a scenic spot in Wuxi, east China's Jiangsu Province, March 14, 2019.

A bird is seen on a flowering tree at a scenic spot in Wuxi, east China's Jiangsu Province, March 14, 2019.

A bird is seen on a willow in Tancheng County in Linyi, east China's Shandong Province, March 14, 2019.

A bird is seen on a flowering tree at a scenic spot in Wuxi, east China's Jiangsu Province, March 14, 2019.

A bird is seen on a willow in Tancheng County in Linyi, east China's Shandong Province, March 14, 2019.