图片大图：
The press conference location
By Yang Nan
Li Zhanjun, host of the press conference
By Yang Nan
Bi Xiaogang, deputy director of Beijing Water Authority
By Yang Nan
Wang Sumei, deputy director of the Beijing Municipal Forestry and Parks Bureau
By Yang Nan
Wang Xiaoming, deputy secretary-general of the Beijing Municipal Government
By Yang Nan
A Reuters journalist is asking questions
By Yang Nan
A reporter from South China Morning Post asks a question.
By Yang Nan
