Various wetlands found in Liaohe River Delta, northeast China

Spotted seals rest on the tidal-flat area of Sandaogou in Panjin , northeast China's Liaoning Province, April 20, 2021. Various types of wetlands have been found in the Liaohe River Delta. (Xinhua/Yang Qing)

This aerial photo taken on Sept. 28, 2022 shows people enjoying the scenery of the Red Beach scenic area in Panjin, northeast China's Liaoning Province. Various types of wetlands have been found in the Liaohe River Delta. The tidelands there are covered by the suaeda salsa, which turn red on the beach in autumn. (Xinhua/Pan Yulong)

This aerial photo taken on Aug. 19, 2021 shows "red beaches" in Liaohe River Delta in Panjin, northeast China's Liaoning Province. Various types of wetlands have been found in the Liaohe River Delta. The tidelands there are covered by the suaeda salsa, which turn red on the beach in autumn. (Xinhua/Yao Jianfeng)

Red-crowned cranes are pictured at a breeding center for crane species in Panjin, northeast China's Liaoning Province, May 9, 2019. Various types of wetlands have been found in the Liaohe River Delta. (Xinhua/Pan Yulong)

A black-billed gull flies over a breeding area in a wetland in Liaohe River delta in Panjin, northeast China's Liaoning Province, May 5, 2022. Various types of wetlands have been found in the Liaohe River Delta. (Xinhua/Yang Qing)

This aerial photo taken on Sept. 28, 2022 shows the paddy fields and the scenery of the Red Beach scenic area in Panjin, northeast China's Liaoning Province. Various types of wetlands have been found in the Liaohe River Delta. The tidelands there are covered by the suaeda salsa, which turn red on the beach in autumn. (Xinhua/Wang Yijie)

This aerial photo taken on May 22, 2019 shows the wetland in Liaohekou National Nature Reserve in Panjin, northeast China's Liaoning Province. Various types of wetlands have been found in the Liaohe River Delta. The tidelands there are covered by the suaeda salsa, which turn red on the beach in autumn. (Photo by Song Yan/Xinhua)

A red-crowned crane is seen at the Red Beach scenic area in Panjin, northeast China's Liaoning Province, Aug. 19, 2021. Various types of wetlands have been found in the Liaohe River Delta. The tidelands there are covered by the suaeda salsa, which turn red on the beach in autumn. (Xinhua/Yao Jianfeng)

People enjoy the scenery of the Red Beach scenic area in Panjin, northeast China's Liaoning Province, Sept. 28, 2022. Various types of wetlands have been found in the Liaohe River Delta. The tidelands there are covered by the suaeda salsa, which turn red on the beach in autumn. (Xinhua/Wang Yijie)

This aerial photo taken on June 16, 2020 shows a wetland restoration project in Liaohekou National Nature Reserve in Panjin, northeast China's Liaoning Province. Various types of wetlands have been found in the Liaohe River Delta. (Xinhua/Pan Yulong)