Photo taken on Oct. 11, 2018 shows an autumn scenery of the fog-enveloped Qishu Lake in Huangshan, east China's Anhui Province. (Xinhua/Shi Guangde)

Photo taken on Oct. 7, 2018 shows a scenery in the Saihanba National Forest Park in Chengde, north China's Hebei Province. (Xinhua/Liu Mancang)

Photo taken on Oct. 10, 2018 shows a farmer working in the field in Qiandaodi Village of Zunhua City, north China's Hebei Province. (Xinhua/Liu Mancang)

Photo taken on Oct. 11, 2018 shows an autumn scenery of the fog-enveloped Qishu Lake in Huangshan, east China's Anhui Province. (Xinhua/Shi Guangde)