Answer:
From 200 B.C.E. to 800 C.E., China’s neighbors, especially Korea, Japan, and Vietnam, began to adopt elements of China’s material, political, and religious culture, including the Chinese writing system.
Force of arms helped bring Chinese culture to both Korea and Vietnam, but military might was not the primary means by which culture spread in this period. Particularly in Korea and Japan, ambitious rulers sought Chinese expertise and Chinese products such as sericulture, bronze swords, crossbows, iron plows, and the Chinese-style centralized governments.
The believed the adoption of the most advanced ideas and technologies would be to their advantage.
In more isolated Japan, Koreans played a large role in the spread of Chinese culture. Korea, Vietnam, and Japan all retained many features of their earlier cultures even as they adopted Chinese practices, in the process developing distinctive national styles. For example, in Korea the government was modeled on the Tang, but was modified to accommodate Korea’s aristocratic social structure.