Is it illegal to print and sell the self-study exam materials (including knowledge pamphlets) summarized by yourself?

Suspected of breaking the law. Because the state controls the printed matter of publications, it cannot spread freely. The booklet you made was printed by yourself, and it is also suspected of violating the publishing order of the country. Printed, audio-visual products such as internal reference materials and publicity materials that do not violate China's current laws and regulations may be copied and distributed within a fixed scope, but they may not be sold in the market.