Aerial photo taken on March 23, 2020 shows the spring scenery of Daming Lake in Jinan, capital of east China's Shandong Province. (Xinhua/Wang Kai)

Photo taken on March 23, 2020 shows the spring scenery of Daming Lake in Jinan, capital of east China's Shandong Province. (Xinhua/Wang Kai)

Aerial photo taken on March 23, 2020 shows the spring scenery of Daming Lake in Jinan, capital of east China's Shandong Province. (Xinhua/Wang Kai)

Aerial photo taken on March 23, 2020 shows the spring scenery of Daming Lake in Jinan, capital of east China's Shandong Province. (Xinhua/Wang Kai)

Aerial photo taken on March 23, 2020 shows the spring scenery of Daming Lake in Jinan, capital of east China's Shandong Province. (Xinhua/Wang Kai)

A tourist visits the Daming Lake in Jinan, capital of east China's Shandong Province, March 23, 2020. (Xinhua/Wang Kai)

Photo taken on March 23, 2020 shows the spring scenery of Daming Lake in Jinan, capital of east China's Shandong Province. (Xinhua/Wang Kai)

Aerial photo taken on March 23, 2020 shows the spring scenery of Daming Lake in Jinan, capital of east China's Shandong Province. (Xinhua/Wang Kai)