China's land border stretches for a long time, and the integration of multi-cultures makes it unique. Xinhua News Agency, China Featured Society and china green foundation launched "Colorful China" in Beijing? The public welfare activity of "Walking on the Border" aims to show the local magnificent stories, vivid people and customs through personal experience, and vividly show and interpret the beautiful China from a microscopic perspective, taking walking on the border of China as the track and taking people and nature as the background. During the visit, the reporting team will interact synchronously through all media platforms such as website, Weibo and WeChat. Chinese and foreign travel enthusiasts can visit the website of China special issue "Crossing China" for details. This activity has distinctive interactive features, and social forces are welcome to join. Whether it is on-site visit or online interaction, there are opportunities to participate. Netizens can also pay attention to Sina Weibo and Douban's # My Free Travel # topic discussion, and the lucky ones have a chance to win a free trip. In addition, the event also hopes to arouse the global public to pay more attention to China's natural beauty and humanistic beauty. By visiting several national nature reserves, this paper tries to gather more public welfare forces to promote the nature conservation in China. The first stop of the activity is the "Earth Gene Bank" Gaoligong Mountain in Yunnan. It is a rare large area on the earth that transits from humid tropical forest to temperate forest, and it has extremely precious and rare animals and plants in the world. Gaoligong Mountain used to be the area where the Southern Silk Road passed, which preserved many historical sites and gathered many ethnic groups such as Han, Bai and Dai 10. Pluralistic national culture has bred various provincial and municipal intangible cultural heritages such as Yongzi, paper umbrella, embroidery and shadow play.