Through the ancient Silk Road, Chang’an (now Xi’an, Northwest China’s Shaanxi province) made extensive exchanges with countries in Central Asia, West Asia, and North Africa during the Tang Dynasty (618-907).
Persia (now Iran), which was situated in West Asia, served as an important hub along the Silk Road and a source of important cultural exchanges. Persians learnt from Chinese culture and also promoted the development of ancient China through exchanges during the Tang Dynasty (618-907).
The diplomatic relations between Chang’an (now Xi’an, Northwest China’s Shaanxi province) and Southeast Asia was mainly based on the Annan safeguard agency (located in present day Hanoi, Vietnam) during the Tang Dynasty (618-907).
As two ancient civilizations, China and Tianzhu, which referred to the India Peninsular (now India, Pakistan, and Bangladesh), kept close contact with each other during the Tang Dynasty (618-907).
During the early period of the Tang Dynasty (618-907), Baekje (18 BC-AD 660) and Goguryeo (37 BC-AD 668) of the Korean Peninsula became tributary states of China due to wars.
The diplomatic relation between China and Japan originated from the early years of the Eastern Han Dynasty (25-220). It greatly developed during the Tang Dynasty (618-907), due to the prosperity of that time.
The prosperous Kaiyuan Reign Period was created by Li Longji, Emperor Xuanzong of the Tang Dynasty (618-907).
The Zhenguan Reign Period (Zhen Guan Zhi Zhi), which lasted from 627 to 649, was the first flourishing period of the Tang Dynasty (618-907). It was created by Li Shimin, Emperor Taizong of the Tang Dynasty, and named after the reign title “Zhenguan” of that time.