The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]

The photo shows the beautiful scenery of Mount Meng in Shandong Province. With a nickname of “natural oxygen bar,” the mountain is a famous tourist resort in China. [Photo/China.org.cn]