You Become Stronger by Giving Apprenticeships, and All Your Female Apprentices Become Empresses!

Chen Changfeng travels to a fantasy world at the beginning and becomes the youngest elder of a cultivating sect. All the disciples he accepts are girls, and he is also bound to a ten thousand times return system for disciples. Whatever he gives to his female apprentice, the system will multiply it by a certain amount and then return it to him. "Ding! You gave a female apprentice a low-grade elixir, and returned the top-grade elixir with a hundred times the critical hit!" "Ding! You passed on a hundred-day cultivation to your female apprentice, and you will receive a hundred-fold critical hit in exchange for a ten-thousand-day cultivation!" "Ding! You give your female apprentice a heaven-level skill, and you will get a god-level skill in return for a hundred times the critical hit!" After being taught by him, his female apprentices actually became empresses many years later!