Traditionally, the vassal kings who were divided into the original Langya County were called Langya Kings, and their fiefdom Langya County was changed to Langya Kingdom. During the Spring and Autumn Period and the Warring States Period, Langya was the main city and port of the Qi State. In the third year of King Yuan of Zhou (473 BC), Yue moved the capital to Langya. The Han Dynasty changed Langya County to Langya State. The old rule was in Linyi, Shandong.

In 221 B.C., after Qin unified the whole country, it analyzed the eastern coastal areas and placed Langya County, with jurisdiction over Langya, Buqi, Jimo, Qianqian and other counties.

According to the Book of the Later Han Dynasty, in the fifteenth year of the Eastern Han Dynasty (39 AD), Liu Jing, the son of Liu Xiu, was named the Duke of Langya.

In the seventeenth year of Jianwu (41 AD), the country of Langya was established again, and Liu Jingjin was the king of Langya.

Langya has jurisdiction over thirteen cities such as Langya. In the first five years of the founding (80 A.D.), Liu Jing wrote to Emperor Zhang of the Han Dynasty, willing to exchange the five counties of Hua, Gai, Nanwuyang, Houqiu and Ganyu of Langya for Kaiyang and Linyi counties of Donghai County, and moved the capital from Jucheng to Kaiyang (located in present-day Linyi City).

The Langya Kingdom has a vast area, many counties, very high taxes, gorgeous palaces, strong capitals, and important military status.