I mean model block, which was first mentioned in Zhang Huaiguan's book Rest. People in the Six Dynasties still used it habitually. For example, Cai of Yang Xin and Shan Wei's On Books all said: "The new words are generals, and the people in Beijing and Zhao are good at regular script." That's the abbreviation of "eight-block method", which didn't replace the name of the official book until the Northern Song Dynasty, and its content was obviously different from the ancient name. There is probably an example of the above. If these concepts are not clear, they will inevitably confuse other aspects forever, which is useless. Regular script is a modular body, as mentioned in Zhang Huaiguan's "Shu Duan". People in the Six Dynasties still used it habitually. For example, Cai of Yang Xin and Shan Wei's On Books all said: "The new words are generals, and the people in Beijing and Zhao are good at regular script." That's the abbreviation of "eight-block method", which didn't replace the name of the official book until the Northern Song Dynasty, and its content was obviously different from the ancient name. There is probably an example of the above. If these concepts are not clear, they will inevitably confuse other aspects forever, which is useless.