Photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

A visitor takes photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019.

Visitors take photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019.

A visitor takes photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019. (Photos:Xinhua)

Visitors take photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019.

Aerial photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

A visitor take photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019.

Aerial photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Visitors take photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019.

Aerial photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Aerial photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Aerial photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Aerial photo taken on Nov. 14, 2019 shows visitors taking photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Aerial photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Aerial photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Visitors take photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019.

Photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Aerial photo taken on Nov. 14, 2019 shows a visitor taking photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Visitors play by the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019.

Photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Aerial photo taken on Nov. 14, 2019 shows the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.

Visitors play by the Qishu lake in the morning in Yixian County of east China's Anhui Province, Nov. 14, 2019.

Aerial photo taken on Nov. 14, 2019 shows visitors taking photos of the winter scenery of the Qishu lake in the morning in Yixian County of east China's Anhui Province.