"It was true during the first 30 years of China's opening-up while China was attracting foreign investment, pollution was an issue," he said

Tensions on the Korean Peninsula escalated recently after US President Donald Trump threatened to deal with the DPRK with "fire and fury" last month

"The current situation on the Korean Peninsula is complicated, sensitive and severe

What is your impression of President Xi Jinping? I think he is a determined man

Smith Memorial Award and the prestigious David Craig Medal for Chemistry