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sky cloud valley tree grass flower nature landscape outdoor fresh beautiful spectacular sight beauty of the sky beauty of clouds the wonders of nature the breathtaking natural landscape a beautiful picture of nature the natural scenery is refreshing the natural beauty of the mind the yearning for nature the harmony between man and nature the responsibility to protect nature the concept of green environmental protection the importance of sustainable development the necessity of ecological balance cherish natural resources protect the earths home a community with a shared future for mankind building a harmonious society realize the Chinese dream of the great rejuvenation of the Chinese nation