David Cameron said the scale of the business delegation travelling with him "mirrors the scale of the ambition that we have for the British-China partnership".
Before going into talks with Premier Li Keqiang, the Prime Minister said:
"We are particularly pleased to come here at the start of the new leadership that will be taking China forward, and particularly pleased that we come following the Third Plenum document, which is such a significant document about the ambition for change that you have in China.
"We think it is a very good time to discuss these issues and to discuss all the aspects of our relationship and partnership going ahead."
Welcoming Mr Cameron to China, Mr Li said: "I believe your visit will be highly productive in promoting the pragmatic business co-operation and people-to-people exchange between the two countries."
The Global Times newspaper's criticism of the UK is stinging given that David Cameron has spent two days courting China's leaders.
David Cameron's visit to China has not been easy to arrange with the pressure for the trip coming from the British.
David Cameron hopes to mend relations with China as he brings a large trade delegation with him.