In recent years, the Chinese government has increasingly utilised online consultation as a means of providing citizens with opportunities to offer feedback on draft laws and regulations. As little is known about the operation of online consultation, this article analyses the content of citizen feedback submitted on a revision to China's health system proposed by the National Development and Reform Commission. Citizen engagement with the political and substantive issues under consideration is crucial if online consultation is to impact government decision-making and enhance the performance of laws and regulations. This paper's main findings are that it was common for comments to address substantive issues in great depth, as well as express negative assessments of government decisions. This suggests that online consultation holds promise as an instrument of governance reform, which the Chinese Communist Party has embraced as a means of cultivating popular support.