It Takes One Day on Earth for Me to Become an Immortal for a Hundred Years

A modern young man accidentally broke into a cave while traveling one day and entered another world. After becoming a powerful cultivator, he traveled through time and space and returned to the original world. However, he found that the time difference between the two time and space was very different. One day on the earth is equal to 100 years in another time and space. After the discovery of the powerful power in the Xuanyuan world, he continued to investigate and finally found a way to connect the two worlds. Fang Chen returned to another world to find the truth.