Photo taken on May 24, 2018 shows the view of Xiaoyushan scenic zone in Qingdao, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Tourists visit the Shandong Garden during the Beijing International Horticultural Exhibition in Yanqing District, Beijing, capital of China, June 9, 2019. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Ju Huanzong)

Tourists visit the Shandong Garden during the Beijing International Horticultural Exhibition in Yanqing District, Beijing, capital of China, June 9, 2019. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Ju Huanzong)

Aerial photo taken on May 19, 2018 shows the view of Diaolongzui Village of Laoshan District in Qingdao, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Aerial photo taken on June 4, 2019 shows a wetland park in Rongcheng, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Wang Kai)

Aerial photo taken on June 23, 2018 shows the wetland of the Yellow River Delta national natural reserve in Dongying, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Photo taken on May 21, 2018 shows the scenery of Laoshan Mountain in Qingdao, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Li Ziheng)

Aerial photo taken on June 14, 2018 shows the Penglai water fortress and the Penglai Pavilion in Penglai, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Aerial photo taken on May 23, 2019 shows kelp being dried at Dongcun Village of Daqindao Township in Changdao County, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Zhu Zheng)

Photo taken on May 22, 2019 shows the scenery of Laoshan Mountain in Qingdao, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Aerial photo taken on June 4, 2019 shows the view of Binhai Park in Rongcheng, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Wang Kai)

Aerial photo taken on April 14, 2019 shows the Daming lake scenic spot in Jinan, capital city of east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Wang Kai)

Photo taken on May 21, 2018 shows the scenery of Laoshan Mountain in Qingdao, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Li Ziheng)

Photo taken on May 21, 2019 shows the view of Taishan Mountain in east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Tourists visit the Baotu Spring Park in Jinan, capital city of east China's Shandong Province, Oct. 28, 2018. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Photo taken on May 21, 2019 shows the view of Bixia Memorial Temple on Taishan Mountain in east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Aerial photo taken on June 23, 2018 shows the view of the Yellow River Delta national natural reserve in Dongying, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Guo Xulei)

Aerial photo taken on May 22, 2019 shows the scenery in Changdao County, east China's Shandong Province. Located on the east coast of China, Shandong is in the lower reaches of the Yellow River. It boasts so many nation-renowned scenic spots including the Yellow River Delta national nature reserve, the Penglai water fortress, Taishan Mountain and Laoshan Mountain. During the past years, local authorities in Shandong Province have been following the guiding principle of green development and paving the way forward in the construction of an ecological civilization. From June 20 to 22, the Beijing International Horticultural Exhibition ushers in "Shandong Day" event, which presents the diversified cultures and ecological development in Shandong to tourists. (Xinhua/Zhu Zheng)