What the vendor said about "recycled paper" is actually to use the express carton to make paper again after pulping, but this recycled paper is not like what the vendor said, and tape is fine. In the process of remaking paper, adhesive tape is still adhered to the carton, which will reduce the quality of paper making. "If the classification is good, the paper box may be recycled. If the classification is not good, the use can only be reduced and some low-grade packaging materials or other paper products can be produced," said Li Li, a researcher at the Institute of Soil and Solid Waste of the China Environmental Science Research Institute.