China’s growth model has two parts. First, through a variety of policies, you increase the share of national income that goes into savings and reduce the share that goes into consumption. In practice, this means restricting the amount of GDP that goes to households and increasing the amount that goes to businesses. Second, you channel those savings through the banking system into investment.
This model is not unique to China. Quite a number of countries have followed it. China has just followed it to a greater extent than any country in history.