Introduction to the Stele Corridor: The Stele Corridor is an antique Langfang building with a total length of 67 meters and a zigzag pattern. The corridor has carved beams and painted buildings, which is antique. The contents engraved on the gallery walls are all historical texts about Cai Lun's papermaking at home and abroad, both ancient and modern. These texts are extremely valuable for the study of Cai Lun and Cai Lun's papermaking. A blank area was specially left for future generations to record.