In the afternoon of 10 May 2023, Professor Chaohua Zeng from the Hong Kong Polytechnic University was invited to give a lecture entitled "Biochar Technology for Waste Recycling and Carbon Reduction" at the Lecture Hall on the 2nd floor of the General Building of Zhejiang Gongshang University. The lecture was hosted by the Department of Science and Technology of Zhejiang Gongshang University, and organized by the Department of Environmental Science and Engineering, and presided over by Meizhen Wang, Executive Dean of the School of Environmental Science and Engineering.

Professor Zeng Chao-Hua is a Professor in the Department of Civil and Environmental Engineering of the Hong Kong Polytechnic University, Director of the Research Centre for Environmental Technology and Management, and a Fellow of the Royal Society of Chemistry. His main postgraduate studies include material pyrolysis and functionalised biochar utilisation, heavy metal migration and transformation mechanisms and environmental toxicology, environmentally sound utilisation of incineration ash, and low carbon and efficient biorefining. He is an Associate Editor of 8 SCI journals including Sci. Total. Environ. and an Editorial Board member of 8 SCI journals including Bioresour. Technol. and an Invited Editor of more than 10 SCI journals including Environ. Int. and has been awarded as a Top Editor of Publons worldwide. He is the chairman of 4 international conferences including the Asia Pacific Biocarbon Conference and co-chairman of 6 international conferences; he has received international awards such as the Young Scientist Award of the International Bioprocess Society.

During the lecture, Professor Zeng Chao-Hua first introduced Hong Kong's experience in the pyrolysis and functionalisation of biomass waste, high value of kitchen waste and the environmentally sound incineration of fly ash. Afterwards, focusing on biochar functionalisation, he introduced the application of biochar-loaded catalysts in the high value conversion of kitchen waste and the degradation of new pollutants, giving two examples of conducting environmental catalysis research in two dimensions: precise pathway regulation and catalyst morphological transformation, respectively. Finally, students and teachers discussed with Professor  Chaohua Zeng in depth about biochar fictionalization and environmental catalysis. The venue was full of excitement and lively discussions. The high quality academic exchange not only broadened the horizons of students and teachers, but also contributed to the rapid growth of our discipline.