1. The toner cartridge can be plug and play, and the inside of the machine can be directly compatible with the machine to avoid powder waste or use of inferior powder to bring machine printing problems, which is more convenient to use. 2. A full, even toner helps to enhance printing and protect the machine. 3. The proportion of toner carrier is reasonable and more compatible with the use of copiers. 4. The printed finished product has good effect, and will not cause the printed table to have burrs, color casts, etc., and the writing of the document has high definition and smoothness. 5. For each product, we will perform multiple use tests. Use toner in the debug machine for various tests to better fit the model.