How did Chinese characters evolve?

Summarize it for you according to the following parts:

I. Evolution process

Oracle Bone Inscriptions: Yin Shang.

Jinwen: Western Zhou Dynasty

Seal character

Da Zhuan: Qin State in the Warring States Period

Xiao zhuan: the standard font of Qin dynasty

official script

Qin Li (Gu Li): The daily font of Qin Dynasty.

Han Li (Jinli): Han Dynasty

Regular script: It sprouted in the Western Han Dynasty, matured at the end of Han Dynasty, prevailed in Wei and Jin Dynasties, and is still in use today.

cursive script

Cao Zhang: Emperor Zhang of the Eastern Han Dynasty

Jincao: Late Eastern Han Dynasty

Weeds: Tang Dynasty

Running script: Late Eastern Han Dynasty

Second, the evolution trend

The general trend of the evolution of Chinese characters is simplification, which is mainly manifested in:

1. The picture description recording mode has been changed to symbol recording mode.

2. It reduces the number of homographs and simplifies the writing and structure of characters.

3, fat pen to thin pen, arc to straight line.

Third, the reasons for the evolution

1, the internal reason: the writer's simple demand and aesthetic requirements for Chinese characters.

2. External reasons: changes in writing tools, writing methods and writing materials.