Republic of China era: A hundred-year-old still practicing martial arts? Is that right?

In the first year of the Republic of China, the land was in ruins, and human life was as worthless as grass.
The dynasty collapsed, warlords carved up the land, gangs devoured people, and foreign devils ran rampant!
In this turbulent time, Lin Ji transmigrated with the Book of Reversal of Fate, but lived a muddled and aimless life for a hundred years. His newlywed wife disappeared, his children and grandchildren died violently, and his granddaughter was sold...
I thought my remaining years would end abruptly, but who knew that the Book of Destiny would be turned over quietly!
A century of check-ins, a single day of commitment.
Ten years of lifespan were added to his body, and his life-defying martial arts bones were imbued into his body, turning a centenarian into a withered tree that had come back to life!
"Starting martial arts at 100 years old? That's quite accurate!"
"I ask you, can a thousand armies withstand a single punch from this old man?"
Trample the powerful clans! Slay the demons and monsters!
Punch the Japanese dogs, kick the real warlord dogs!
I only started practicing martial arts at the age of one hundred. You call me the oldest old man in Chinese history, and I won't argue with you.
Another hundred years have passed, and I am still alive. I am a martial saint, invincible among men. What should you call me now?
……
This is a world of one man, and also an era of one man!