As one of the largest international conferences in waste management field, the 15^th International Conference on Waste Management and Technology (ICWMT15) was organized by UNEP, Basel Convention Regional Center for Asia and Pacific and Tsinghua University, between June 28^th to 30^th, 2020. The theme of this year was zero-waste cities promotion in the globe. Due to the covid-19, the conference was organized online with more than 4500 participants. Affiliated with ICWMT15, Dr Dong organized session entitled “Eco-industrial development support zero-waste cities: a global perspective”, and invited scholars from China, Japan, and South Korea to share the up-to-date progress in this field. The session was awarded to “Excellent Session Award”, with over 2800 participants.