Aerial photo taken on Nov. 5, 2020 shows the scenery of the Baiyangdian Lake in Xiongan, north China's Hebei Province. With effective governance, the ecological environment of Baiyangdian Lake has improved a lot in recent years. (Xinhua/Mu Yu)

Aerial photo taken on Nov. 5, 2020 shows the scenery of the Baiyangdian Lake in Xiongan, north China's Hebei Province. With effective governance, the ecological environment of Baiyangdian Lake has improved a lot in recent years. (Xinhua/Mu Yu)

Aerial photo taken on Nov. 5, 2020 shows the scenery of the Baiyangdian Lake in Xiongan, north China's Hebei Province. With effective governance, the ecological environment of Baiyangdian Lake has improved a lot in recent years. (Xinhua/Mu Yu)

Aerial photo taken on Nov. 5, 2020 shows the scenery of the Baiyangdian Lake in Xiongan, north China's Hebei Province. With effective governance, the ecological environment of Baiyangdian Lake has improved a lot in recent years. (Xinhua/Mu Yu)