China's surprise undertaking to reform its judicial system gave rise to speculation that a more independent judiciary was likely. Comments about widening China's welfare system were also unexpected.
On market reform, Richardson said it looked like China was interested in achieving better resource allocation, using mechanisms so that pricing can play a clearer role.
"In the coming days and months you will see more detail there about the reform areas, which potentially will be more influential for the market," Richardson said.
Louis Kuijs, chief China economist at Royal Bank of Scotland Group in Hong Kong, said it looked like China was going in the right direction.
"Even though some of the phrasing is new, the ideas are not so new."
The communique reiterated the role of state ownership while saying development of the non-public sector will be "encouraged".
Hao Hong, a Hong Kong-based strategist at Bocom International, said the meeting "underwhelms in details".
When Premier Li Keqiang took office in March, he pledged to open the economy to market forces.
GDP expanded 7.8 per cent in July-to-September from a year earlier, from a 7.5 per cent gain in the previous period, bolstering Li's chances of meeting the government's 7.5 per cent full-year growth target.
State media had heralded the meeting as a "watershed" for reform, putting it in the same category as 1978's third plenum when former paramount leader Deng Xiaoping broke with decades of Maoism and introduced pro-market policies.
additional reporting: Bloomberg