How would you characterize the tang dynasty behaviour toward korea

Tang dynasty lead by the powerful leader Tai-tsung. it was the golden age for poetry, painting and famous for tricolored glazed poetry and woodblock printing. Tang dynasty impacted Korea, many aspects of Japan and Korea are traced back to roots in Chinese culture. The Chinese written language not only served as the first records of both Japanese and Koreans history, but it also adopted and served as their first writing system. The success of Tang dynasty mirrored in establishing strong political states. The most mirrored nation of China was Korea.