So What If the System Is Unreliable? I Still Become an Immortal!

Zhang Qi originally had a special physique with two souls in one body, but after a purposeful, premeditated and colorful battle, the first soul fell into a deep sleep and the second soul woke up. But this second soul is a modern person. So, under the mistaken belief that he had traveled through time, Zhang Qi, the second soul, started his own adventure. An accident decades later, the first soul finally revived... The introduction is weak, please read the text. ..