Seeking the name of a time-travel novel

forget the name
Time travel type
At the beginning of the content, the male protagonist (seems to be a rich man) deliberately alienated his fiancée because of cancer
Then the male lead died (suicide?)
Travelling to ancient times
Became the son of a country's general
The general had a good friend who was a top master in the martial arts world. At first, he looked down on the former paper servant.
Later, the person who was replaced by the protagonist began to show a different temperament from before
At a dinner party that was supposed to embarrass him, he played a musical instrument. It seemed like a man should be self-reliant.
At the end of the story, the fiancée of the male protagonist also transmigrated after knowing the details. She transmigrated to the master of one of the male protagonist's wives.
Please help me think of which time-travel novel it is based on the content. Thank you.

Answer 1

There was a young man named Zhao Tian who accidentally transmigrated to an unfamiliar world. In this world where magic and technology coexisted, Zhao Tian began his adventure. He met many interesting people, experienced many thrilling events, and finally became the leader of this world. The titles of the novels can be " Magic Age "," Empire of Science and Technology "," Crossing the Other World "," The Evolution of the Demon King in the Other World ", etc. I hope you like them.