What is the most correct book to read if you want to learn the diplomatic history of the Tang Dynasty?

Let me recommend some good books to you. Ancient books: Biography of Old Tang Book (other parts are too long to read); Ji Tang's History as a Mirror (highly recommended! ! ) Modern works: Zhang Guogang's Study on Fan Town in Tang Dynasty, and Wu Zongguo's Popular Reading: Tang Shi is not like smoke (it is better to look directly in the mirror).