Why are there Chinese characters on Vietnamese paintings?

Chinese characters were introduced into Vietnam in the Han Dynasty. /kloc-In the 3rd century, the pictophonetic character "Zinan" was formed in Vietnam and has been used in parallel with Chinese characters.

Vietnam was occupied by the Ming Dynasty: 1407 to 1428, the monarch of the Chen Dynasty in Vietnam was usurped by his consorts, and China Ming Chengzu overthrew the Hu regime at the request of the Chen Dynasty's wishes; After the Ming army occupied Vietnam, it set up a propaganda and deployment department and ruled directly again, that is, "Annan belongs to the Ming."

Until19th century, France attacked Vietnam, and the Qing Dynasty, as the suzerain country, sent troops to support it, and the Qing Dynasty was defeated. Giving up the power as a sovereign country, Chinese characters will gradually withdraw from the use of Vietnamese characters.

Jialong is the title of King Jialong, the founder of the last feudal dynasty in Vietnam.

Nine years in Jialong should be: 18 10 year.

I hope I can help you.