All the Female Apprentices Want to Kill Me

As someone from the 21st century, I was transferred into the body of a man named Su Bei in a different world, with the "Up to 10,000 times feedback for taking disciples" system. All my disciples are pretty, and they are all girls of great luck. Every one of them can be a protagonist in a novel. But they all hate me so much that they want to kill me. What on earth did the original Su Bei do to his disciples in his previous life?!!