![Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China\'s Hebei Province. (Xinhua/Pan Zhengguang)](http://www.ecns.cn/hd/2018/09/30/809dc835e08d439082be1f970debfd05.jpg)
Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China's Hebei Province. (Xinhua/Pan Zhengguang)
![Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China\'s Hebei Province. (Xinhua/Pan Zhengguang)](http://www.ecns.cn/hd/2018/09/30/387b1c6a61ff471b8180455bd65eef26.jpg)
Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China's Hebei Province. (Xinhua/Pan Zhengguang)
![Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China\'s Hebei Province. (Xinhua/Pan Zhengguang)](http://www.ecns.cn/hd/2018/09/30/b3688156bfa942a0b61ec51520f34e2a.jpg)
Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China's Hebei Province. (Xinhua/Pan Zhengguang)
![Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China\'s Hebei Province. (Xinhua/Pan Zhengguang)](http://www.ecns.cn/hd/2018/09/30/3c3f7231bb464da68dfd0dccb2232035.jpg)
Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China's Hebei Province. (Xinhua/Pan Zhengguang)
![Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China\'s Hebei Province. (Xinhua/Pan Zhengguang)](http://www.ecns.cn/hd/2018/09/30/b1ae36e17b8d4dee9f3b237d367b2aab.jpg)
Photo taken on Sept. 29, 2018 shows the scenery in Saihanba National Forest Park in Chengde, north China's Hebei Province. (Xinhua/Pan Zhengguang)