As Li Bian himself, while serving as regent of Wu, had often revised laws to try to improve Tang laws, he ordered the judges and the executive bureau to reorganize the laws into a 30-volume work entitled, the Laws of Shengyuan (Shengyuan being his era name).
Karena Li Bian sendiri, ketika melayani sebagai wali penguasa Wu, sering merevisi undang-undang untuk mencoba meningkatkan hukum Tang, ia memerintahkan hakim dan biro eksekutif untuk mengatur kembali undang-undang itu menjadi 30 volume pekerjaan berjudul, Hukum Shengyuan (Shengyuan menjadi nama era).