At first, it was hieroglyphics. Oracle Bone Inscriptions appeared in Shang Dynasty, like a square shield with a handle inside. The inscriptions on bronze in the Western Zhou Dynasty, while following the structure of the previous generation, added the word "ren" on the basis of Oracle Bone Inscriptions, which also sounds like pictophonetic characters. The ideographic person is an ideographic character, which shows that the original meaning of the shield character is related to people. Shape and sound are the images of the shield, indicating that the original meaning of the shield is related to the shield, and the expression of sound, buttons and characters is determined by the combination of the shield and the shield. During the Warring States Period, "Figure D" was misrepresented; More is stored as "Figure E", which is close to the factory and Guangzhou. The shield is made of the Western Zhou Dynasty pictures F, G, H, I and J. In fact, Xiao Zhuan saves himself, with the sound of "figure K" (dù n). Use regular script as a shield.
I hope it can help you solve the problem.