I recommend you to read the book "Villain Boss: Starting from the Invincible East", a doujinshi related to the Invincible East. In this light novel, the protagonist transmigrated to Invincible East and awakened a villain boss system. He began to embark on the path of changing the plot. Although there was no specific description of the relationship between Invincible East and Linghu Chong, there were some interactions between the two of them. I hope you like this story. Muah ~