I Was Stabbed in the Back by the System and Became an Immortal

"Dingdong, the power leveling system is here to serve you wholeheartedly. This system saves you from boring training and makes your immortal life come alive. During the training process, you will temporarily lose control of your body. Please do not panic. I wish you a happy level training. " "Ding dong, it was detected that there is a lack of cultivation elixir to induce thunder. Retrieval is in progress, please wait..." "Ding dong, after the search is completed, the system will give you a free thunder pill, please wait..." Gu Jiantang watched helplessly as the system controlled his body and rushed to the eldest sister's boudoir... "Ding dong, the detected sword skills are not comprehensive. The retrieval is in progress. Please wait..." "Ding dong, the search is completed, the system will give you the full version of the sword technique, please wait..." … Thousands of years later, Gu Jiantang was about to ascend. He said with emotion: "The system has abused me thousands of times, and I treat the system like my first love..."