David Cameron said he wanted to strengthen the UK's relationship with China as he welcomed premier Li Keqiang to Downing Street.
But campaigners have urged the Prime Minister to raise China's human rights record with Mr Li during the discussions.
Mr Cameron said the links between the two countries were "very strong" and the visit was an opportunity to "take them to a new level."
Mr Li is accompanied by a team of Chinese business bosses, who are in the UK for the return leg of a trade boosting link-up begun by David Cameron last year.
More top news
The young Labour supporter seen celebrating an impromptu photo with Ed Miliband has defended her desire for an early campaign selfie.
An unsettled weekend of weather forecast as conditions turn wet and windy from the west tonight and slowly clear eastwards through tomorrow
An astronaut has set off for NASA's first year-long mission to the International Space Station - leaving his identical twin back on Earth.