The money printed by the central bank is not given to banks for free.

The central bank provides several types of mortgage loans to commercial banks, representing ultra-short-term, short-term, medium-term and long-term loans respectively. The bank took various IOUs (bonds) and the like and told the central bank to borrow some money, so the banknotes (base currency) were printed and transferred to the accounts of commercial banks.

The money printing war refers to the government's implementation of quantitative easing measures to expand the scale of funds for purchasing assets. In this context, a large amount of money is printed. This economic phenomenon is mainly to control the appreciation of the domestic currency, increase exports, and stimulate the domestic economy, but it will also lead to inflation. Following the United States, on September 19, 2012, the Bank of Japan announced a new round of quantitative easing policy, thereby joining a new round of money printing war. The United States and Japan joining the ranks of money printing may cause China to also fall into a "money printing war."