To carry out reform requires common understanding, which no doubt is a long process. Highly centralized planned economic system has been going on in China for quite a long time. Thus it needs time and efforts to make a change. What's more, we have no ready model to follow as how to carry out market economy under the condition of socialism. The solution to the problem needs a long time searching in the practice.
Reform speeds up the development of productive forces.
But it also should be sustained by material base. Only in this way can reform go further. Under these circumstances, China's reform has been pushing forward gradually so as so leave a pace for further reform and to make it easier to adjust and control the reform process. It turns out that the method is effective. Properly handle the relations among reform, development and stability.