According to Baidu Library, three studies and three questions are the contents of the party's mass line education practice activities, which mean as follows:

Three questions: for whom, on whom, and who I am.

Three Studies: party constitution, Party History and Literature.

Focusing on maintaining the party's advanced nature and purity, it is a major deployment made by the 18th National Congress of the Communist Party of China to carry out the party's mass line education and practice activities with the people as the main content. On may 9th, 20 13, the Central Committee of the Communist Party of China issued "opinions on carrying out the party's mass line education and practice activities in the whole party".