Purple Stars Descend from the Sky in the Tang Dynasty

My father is known as the Six Emperor Maru, and everyone around him, including himself, has become an emperor, but why am I not the eldest son among them? Li Chongrun stood in the courtroom, looking at the cruel official's ferocious face and the raised butcher knife, he realized... That night there was lightning and thunder. That night the sun and moon were in the sky. That night purple stars fell from the sky in the Tang Dynasty! This book is also known as "The Legend of Di Renjie Assisting Li Chongrun in Solving the Case", also known as "Journey to the West with Wukong on My Side"