Aerial photo taken on March 8, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 7, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Photo taken on March 8, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 8, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 7, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 8, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 8, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 7, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 7, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 7, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 8, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.

Aerial photo taken on March 8, 2021 shows the scenery at the Puzhehei national wetland park in Qiubei County of southwest China's Yunnan Province.