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Experts and scholars from all over the world gathered together to share and exchange the academic value of the Chengjiang Biota and discuss the development of paleontology in the world.As the discoverer of this important achievement, paleontologist Professor Hou Xianguang gave a speech at the academic forum.On July 1, 40 years ago, with Hou Xianguang鈥檚 鈥渟hattering hammer鈥?on the western slope of Maotian Mountain in Chengjiang, a door was opened to gain insight into the Cambrian explosion of life; on July 1, 12 years ago, the Chengjiang Fossil Site was included in the World Heritage List by UNESCO, becoming China鈥檚 first and Asia鈥檚 only fossil world natural heritage.A reporter from Yunnan.com conducted an exclusive interview with this 70-year-old professor. When he talked about every detail of 40 years ago, he still remembered it vividly.Looking forward to the future protection and development of the Chengjiang fossil site, Hou Xianguang also has a new perspective.40 years ago: The "final word" at Maotian Mountain in Chengjiang"It was a Sunday morning, and it was raining lightly..." On July 1, 1984, Hou Xianguang climbed to Mount Maotian in Chengjiang County, Yuxi City, Yunnan Province (now Chengjiang City). After breaking open an unknown number of stones, a lifelike Narozoa fossil suddenly appeared."At that moment, the air seemed to be still. I stared at the specimen blankly, my hands shaking." At this point, the secret of the Cambrian explosion of life 518 million years ago in the biological world is presented to the world.QReporter: As a discoverer, looking back on these 40 years, what is your biggest feeling?Hou Xianguang: Very excited.I am excited not only because of its scientific significance, but also because of the many unexpected things that happened after the discovery. For example, in 2012, the Chengjiang Fossil Site was rated as the only fossil world natural heritage in China and even Asia, and the Chengjiang Fossil Site World Natural Heritage Museum was built. This discovery created employment opportunities for many people, and also brought profound social and economic impacts to the local area.QReporter: What work and efforts have you done in the past three years from the discovery of the fossil to its official announcement?Hou Xianguang: To be precise, these three years have been the busiest three years for me in my paleontological research work.Because this is a new research field, I feel happy but also under a lot of pressure. I need to produce results as soon as possible.How to publish the results with high quality and high level and how to show its scientific significance to the outside world is also very important.During the past three years, I kept collecting fossils in the wild. After collecting the fossils, I went back to study them. On New Year's Eve and the first day of the Lunar New Year, I worked overtime every Sunday.It was not until 1987, after six articles had been published about this major discovery, that we officially announced the discovery of the Chengjiang Fossil Group.Looking back now, it is the pressure and achievements of these three years that laid a solid foundation for me to follow the path of scientific research.QReporter: In the past 40 years, what impact has the discovery of the Chengjiang fossil site had on the research direction of the world鈥檚 biological community?Hou Xianguang: As early as the early 1990s, international scientists had made clear evaluations in newspapers and periodicals. The discovery of the Chengjiang fossil site changed scientists' traditional views and understanding of the evolution of early life.With the development of the scientific era, the younger generation of scientists has achieved more significant results based on the foundation we have laid through the use of advanced instruments and advanced technologies, and has accomplished many things that we have not done before.I believe that in the future, research will continue to make breakthroughs.40 Years: Climbing the "Building of Science" Without StoppingThe road to science is never smooth, and only the brave are not afraid of the bumps.Although he calls his job "knocking rocks and looking for fossils," Hou Xianguang has never found it boring to engage in this research day after day."I hold on to the hope of discovering important fossils every day, so I work very nervous and tired every day, and I go into work energetically every day."With the joint efforts of scientists from all over the world, more than 20 categories and more than 300 species of Cambrian rare animal and plant fossils have been discovered in the Chengjiang Fossil Site, 80% of which are new species. The ancestors of almost all living animals can be found here.QReporter: What is the process of researching the Chengjiang fossil site in your opinion?Hou Xianguang: The fossil is crushed, and we can only see a very small part of it. It is very difficult to understand its complete structure. Most of the more than 300 species discovered so far cannot even recognize 50% of them.Some scientists commented that the Chengjiang biological fossil group "will always be the edifice of science." Research on it is a very slow process, and such research will last for decades or even hundreds of years. Therefore, research can only be promoted through large-scale collection based on specimens.QReporter: What are your prospects for future research on the Chengjiang fossil group?Hou Xianguang: The study of the Chengjiang biological fossil group not only produced results, but also brought a lot of controversy and noise.How to conduct more in-depth research through different ideas and the use of new technologies and new instruments to reduce and eliminate these noises. I think this is a direction for future efforts.QReporter: Could you please introduce us to some of the cutting-edge technologies in this subject?Hou Xianguang: For example, CT, which was originally only used in medicine, is now used in fossil research.Because fossils are buried in stones, CT can reveal the structures in fossils, no matter how deep or shallow, in a three-dimensional form. This is a big breakthrough.QReporter: What do you think the discovery of the Chengjiang fossil site means to Yunnan?Hou Xianguang: The discovery of the Chengjiang Fossil Site has added a world natural heritage to our country, especially to Yunnan.At the same time, with continued in-depth research and re-understanding, it will have an increasingly positive impact on the local economy, society and scientific research.QReporter: What changes has the discovery of the Chengjiang Fossil Site brought to you personally?Hou Xianguang: It changed my life, changed my research direction, and formed a new discipline.At the same time, relying on this base of science popularization, I believe it will also bring influence and changes to everyone.QReporter: What advice do you have for young people who want to engage in, or are currently engaged in, paleontological research?Hou Xianguang: The advice I want to say most is to work hard and guard against arrogance and impetuosity.First of all, you must set a goal in your mind, and then find ways to achieve this goal. There will definitely be various difficulties, problems, and dissatisfactions during the process, so you must have a strong psychological quality to bear these.Don鈥檛 be too discouraged when you encounter difficulties, don鈥檛 forget to set goals, and don鈥檛 get carried away when you achieve results.Reporter's Notes40 years later: changes brought about by fossilsOn the bank of Fuxian Lake, the Chengjiang Fossil Site World Natural Heritage Museum stands quietly.This large-scale natural history museum integrates collection, research, display, and education. It displays more than 60,000 rare specimens at home and abroad.Countless tourists come here every year to transcend time and space through rich and novel technological means such as VR, AR, somatosensory interaction, and spherical screens, and personally participate in this story of the evolution of life that lasts for hundreds of millions of years.The Cambrian town located next to the Chengjiang Fossil Site has also become a popular place for parent-child tours and research tours thanks to the research craze set off by the Chengjiang Fossil Site World Natural Heritage Museum.Fossils have come to life, and cultural tourism has become popular.This "scientific research holy land", which has been known to people since 1984, has quietly transformed into a "science popularization resort" in 40 years.In the future, what changes will Chengjiang Fossil Site bring to us?It's exciting.Reporters: Li Jie, Hu Jintao, Sun YinxiangPoster: Li JiayingVideo: Sun Yinxiang, Wang Xiaoyu, Chen Simeng