Jointly-hosted by South China University of Technology (SCUT) and Kunming University of Science and Technology (KMUST), jointly-organized by SCUT, the Key Laboratory of Pollution Control and Ecological Restoration in Industrial Clusters of Ministry of Education and the School of Environmental Science and Engineering of KMUST, and co-organized by the School of Agriculture and Biological Sciences of Dali University, “the 2nd Mine Environmental Contamination and Remediation Academic Seminar” was successfully held in Dali, Yunnan from November 6^th to 8^th.

With the theme of 'Green Mines for Sustainable Development', the conference was supported by Guangxi Bossoco Environmental Technology Inc., Guangzhou CAOMUFAN Ecological Research Co., Ltd., and Yunnan Taibi Economic and Trade Co., Ltd. More than 600 attendees from all over the country participated in this conference, including experts, scholars, students, and business personnel. This seminar was one of the conferences that has the highest expert levels in the field of mining environment and the largest number of attendees in recent years in our country.

The opening ceremony was held on the morning of November 7^th, which was presided over by Professor Li Fangbai from the Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, who was also the director of the organizing committee of the conference. Professor Dang Zhi, Director of the Key Laboratory of Pollution Control and Ecological Restoration in Industrial Clusters of Ministry of Education and Chairman of the Conference, and Professor Wang Hua, President of Dali University, delivered opening speeches on behalf of the organizers and co-organizers. Professor Dang Zhi shared his own experience with lively and interesting expressions and his old and new photos. His speech let the attendees taste the pain and pleasure of being a “miner”in a time-and-space-spanned manner. President Wang Hua shared the development of environmental-related disciplines in Dali University and wished the conference a complete success.

After the brief opening ceremony, Professor Chai Liyuan, academician of the Chinese Academy of Engineering and Professor of Central South University, presented a wonderful academic feast with the theme of 'Progress of Stabilization in Mining and refinery contaminated site Remediation'. Afterwards, Professor Hu Zhenqi from China University of Mining and Technology (Beijing), Professor He Mengchang from Beijing Normal University, Professor Dong Hailiang from China University of Geosciences (Beijing), Professor Zhang Lizhi from Central China Normal University, Professor Chen Mengfang from the Institute of Soil Science, Chinese Academy of Sciences, and Professor Pan Bo from Kunming University of Science and Technology all delivered excellent reports. Liu Yu, Director of the Department of Earth Sciences of the National Natural Science Foundation, gave a conference report on 'Development and Prospect of Environmental Geosciences', which introduced the basic situation and development needs, development status and existing problems of Environmental Geosciences. He also emphasized the discipline optimization of Environmental Geosciences and the development priority in the future.

The three themed branch venues in this conference were held simultaneously in the afternoon of November 7^th.

The theme of the first sub-meeting was 'Treatment and Pollution Control of the Mining Wastewater and Waste Residue'. The conveners were Professor Zhou Lixiang from Nanjing Agricultural University and Professor Guo Huaming from China University of Geosciences (Beijing). 13 scholars, from Peking University, Central South University, Huazhong Agricultural University and two related outstanding companies were invited to give oral presentations. The students and teachers at the meeting all responded enthusiastically. They actively communicated and discussed with the presenters about the theme, exchanged the views of important progresses in this field and discussed the future development direction.

The theme of the second sub-meeting was 'Ecological Restoration and Environmental Supervision of Mining Wasteland'. The conveners were Professor Shu Wensheng from South China Normal University and Professor Yao Jun from China University of Geosciences (Beijing). 12 scholars, from Tsinghua University, the Eco-Environment Research Center of the Chinese Academy of Sciences, South China Normal University and other universities and research institutes, were invited to give oral reports. The teachers and students on site actively communicated and asked questions, which brought new perspectives and ideas for the ecological restoration of mines and environmental supervision.

The theme of the third session was 'Remediation of Heavy Metal Pollution in Mining Areas and Surrounding Farmlands'. The conveners were Professor Pan Bo from Kunming University of Science and Technology and Researcher Wu Longhua from the Nanjing Institute of Soil Science, Chinese Academy of Sciences. 12 researchers, from China University of Geosciences (Beijing), Tianjin University, the Institute of Eco-Environmental and soil sciences, Guangdong Academy of Sciences, and other universities and research institutes, were invited to give oral reports. The meeting enjoyed a heated discussion and the attendees felt that they had benefited a lot.

In the conference report held in the morning of November 8^th, Professor Ma Qiying from Zhejiang University, Professor Chen Jiubin from Tianjin University, Professor Jia Yongfeng from Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Researcher Ma Jingyuan from Shanghai Institute for Advanced Study, Chinese Academy of Sciences, and Researcher Liu Tongxu from Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Chief Engineer Xie Yun, Soil Remediation Division of Guangxi Boschke Environmental Technology Co., Ltd., Professor Qu Jianhua from Northeast Agricultural University, Professor Guo Huaming from China University of Geosciences (Beijing), Professor Shi Zhenqing from South China University of Technology, Professor Feng Xinbin from Institute of Geochemistry, Chinese Academy of Sciences, etc. delivered relevant reports. After the conference report, Professor Pan Bo from Kunming University of Science and Technology presided over the closing ceremony and prize-awarding ceremony.

In order to promote the improvement of the research level in the field of Mine Environmental pollution and restoration, enhance academic exchanges, and encourage the high-standard and high-quality postgraduate academic reports, this seminar established a postgraduate forum and set up the 'Outstanding Report Award' and 'Expression Standard Award'. A total of 38 graduate students gave academic reports. The “Outstanding Report Award” recognizes those graduate students who works hard, strives for perfection and innovation on the path of academic research. The “Expression Standard Award” emphases the rigorous attitude and careful preparation, hoping to arouse more attention and thinking to 'academic standards' and creating a more standardized academic research environment. After the evaluation by the judges and on-site voting, 10 'Excellent Report Award' and 10 'Expression Standard Award' were selected respectively. Among the reporters, Ding Yang, Feng Shihui, Li Xiaofei, Lu Jingli, Pan Jiafeng, Yao Qian, Yi Peng, Zhang Jiaxi , Zheng Xiongkai, Zhu Ziyang received the 'Excellent Report Award', and Li Xiaofei, Pan Jiafeng, Wang Heng, Wang Yumeng, Yao Dongju, Yu Xianan, Zheng Jin, Zhou Yuchen, Zhou Yuxing, and Zhu Ziyang received the 'Expression Standard Award'. It is worth mentioning that Li Xiaofei from South China University of Technology, Pan Jiafeng from the Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences and Zhu Ziyang from Kunming University of Science and Technology won two awards at the same time, representing the highest level of student report in the Graduate Forum.

After the prize-awarding ceremony, Professor Dang Zhi, who was the convener of the conference on mining environmental pollution and restoration academic conference, announced the successful conclusion of the conference. He sincerely thanked the attendees for their coming and support to this conference, the speakers for sharing their research at this conference, and the volunteers and conference staffs for their hard work. He hoped that the next conference would be even better, and everyone would again get together somewhere in 2022.

The organizing committee of this conference advocated and implemented the environmental protection concept of reducing plastic and paper. The specific measures include: ①No plastic casing for personal badges, conference materials bags are non-woven environmental protection bags, and reduce plastic use to avoid the intensified plastic pollution ; ②Minimize the thickness of the conference manual, print conference manuals in limited quantities, and do not print paper conference abstracts. At the same time, QR codes are provided to download electronic conference manuals and conference abstracts to reduce paper use and waste.