Bubo scandiacus

The snowy owl, also known as the polar, white or Arctic owl, is a large, white owl and one of the largest species of owl; it is the only owl with mainly white plumage. Males tend to be a purer white while females have more extensive flecks of dark brown. It has bright yellow eyes and small ear tufts of about 10 feathers (Wikipedia, general species account).

It is native to the Arctic regions of North America and the Palearctic, breeding mostly on the tundra. Unlike most owls it is often active during the day, especially in summer. It lays a very large clutch, often five to eleven eggs, with laying and hatching considerably staggered. The source does not describe its status in China (Wikipedia, general species account).