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.
The Emperor Wu Reign Period was a prosperous period in ancient China, created by Emperor Wu of the Western Han Dynasty (206 BC-AD 24).
The Wen-Jing Reign Period (Wen Jing Zhi Zhi) was created by Emperor Wen and Jing of the Western Han Dynasty (206 BC-AD 24).
The Cheng-Kang Reign Period (Cheng Kang Zhi Zhi) was the first flourishing period in Chinese written history. It was created by Emperor Cheng and Kang of the Western Zhou Dynasty (c.11th century-771 BC).