Photo taken on May 19, 2016 shows Mashan Hoodoos in Jimo, east China's Shandong Province. The Mashan Hoodoos was listed as China's national nature reserve in 1994. (Xinhua/Liang Xiaopeng)

Photo taken on May 19, 2016 shows Mashan Hoodoos in Jimo, east China's Shandong Province. The Mashan Hoodoos was listed as China's national nature reserve in 1994. (Xinhua/Liang Xiaopeng)

Photo taken on May 19, 2016 shows Mashan Hoodoos in Jimo, east China's Shandong Province. The Mashan Hoodoos was listed as China's national nature reserve in 1994. (Xinhua/Liang Xiaopeng)

Photo taken on May 19, 2016 shows Mashan Hoodoos in Jimo, east China's Shandong Province. The Mashan Hoodoos was listed as China's national nature reserve in 1994. (Xinhua/Liang Xiaopeng)