Liu Sijia, Programme Associate, UNEP China Office, 联合国环境规划署驻华代表处项目助理, Samuel Chui Ho-kwong, JP Director of Environmental Protection 香港环境保护署署长,徐浩光博士, Zhang Ruilin, DP2 Student at BWYA, Dr Samuel Chui Ho-kwong, JP Director of Environmental Protection Environmental Protection Department (EPD), Hong Kong SAR Government (Left to Right).