1. Online purchase: Many online education platforms and educational resource websites provide test paper purchase services. You can search and buy the required test papers on these platforms.
2. Bookstore purchase: Go to the local bookstore, find the relevant education counseling information area, and ask the clerk if there is a test paper for the fourth grade mathematics of the famous teacher Guan unit.
3. Buy preschool education institutions: Some preschool education institutions or remedial classes will sell relevant test papers. You can ask nearby educational institutions if they sell them.
4. Ask teachers or other parents: You can ask teachers, other parents or educational groups in your child's school whether there are channels and sources for this test paper.