Secretary-General of the United Nations Antonio Guterres makes a special talk on sustainable development and climate change in Islamabad, Pakistan, on Feb. 16, 2020.(Xinhua/Liu Tian)

It is always difficult to have a quick solution, but China has made a "very strong and very impressive response," said Guterres.

ISLAMABAD, Feb. 17 (Xinhua) -- United Nations (UN) Secretary-General Antonio Guterres expressed confidence in China's great efforts to combat the current outbreak of the novel coronavirus pneumonia, or COVID-19, here on Sunday.