However, it is said that Wang Langya's most brilliant period was the Eastern Jin Dynasty, "Wang Ma * * * the world". Ma was the founding emperor of the Eastern Jin Dynasty and also the emperor of the Jin Dynasty, and Wang was the most prominent figure in the Wang family of Langya. Si Marui, formerly known as King Langya, got the full support of the Wangs. At the end of the Jin Dynasty, there was chaos in the world. Under the planning of Wang Dao, he supported Si Marui to establish the Eastern Jin regime. It can be said that Si Marui's life experience is inseparable from the Langya royal family. So Si Marui asked Wang Dao to sit in the dragon chair with him at the enthronement ceremony. Instructor Wang Ju assisted three emperors, Yuan Di, Ming Di and Chengdi, and became the real founder and manipulator in the early Eastern Jin Dynasty. Most of Wang's descendants and family members are also important members of North Korea.
During the Eastern Jin Dynasty, the Wangs had eight queens, and more than 20 people married royal princesses. In the army, his military strength was greater and his political position unshakable, which had a far-reaching impact on the whole Eastern Jin Dynasty. His cousin, Wang Dun, the secretariat of Yangzhou, is an army of six countries and is heavily guarded. Later, the rebellion threatened the Kim family, which also reflected the power of the Wang family. In the cultural circle, the Wang family is also quite famous, including the famous calligrapher Wang Xizhi. Liu Yuxi's famous sentence "Wang Xietang flew into the homes of ordinary people from Yan" refers to Wang Langya and Chen.