Parallel Time Travel

There is a person from the future, where there is a machine that can travel through time and space. Due to his own negligence, this person was involved in the machine and came to the past era. People were also very confused. Then this person went through various methods and efforts of his own, and the hard work paid off. In the end, this person successfully returned to his own era, and gained a lot of knowledge and insights during this time travel. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.