My Days Pretending to be an Immortal in Ancient Times

'''Writing is not easy, so please support the official version, my dear readers. Love you all, mwah mwah. Chu Qiuzé accidentally traveled back in time to ancient times and was forced to bind with a system tasked with saving the world. Fortunately, this system allows him to return to the modern era anytime. As long as he can go back, dealing with a famine or curing a plague is no big deal. He can handle it! Friend, care to learn about Northeastern rice? Brother, want to give injections and IV drips a try? ... As high-tech marvels appear in the world, rumors of a deity descending to the mortal realm spread far and wide. A certain blue-surnamed regent, a staunch atheist, held a long b...