Provincial periodicals. Provincial periodicals refer to periodicals sponsored by provinces, autonomous regions and municipalities directly under the Central Government and their subordinate ministries, commissions, departments, bureaus and colleges, which can be distributed across provinces in the country.

Friends of Mathematics is an educational provincial periodical. It was founded in 1987, sponsored by Nanjing Normal University and Nanjing Mathematical Society, and supervised by Jiangsu Provincial Department of Education. It meets the standards of provincial periodicals, so Friends of Mathematics is a provincial periodical.