Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)

Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)

Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)

Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)

Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)

Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)

Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)

Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)

Photo taken on June 1, 2018 shows the scenery of Laoniuwan National Geopark at sunrise in Qingshuihe County, north China's Inner Mongolia Autonomous Region. (Xinhua/Zou Yu)