Yang Guo: I'm invincible in the opening battle against Aunt Guo!

I transmigrated into a martial arts world and became Yang Guo, and the story begins with Aunt Guo being poisoned!
In the critical moment, Yang Guo cured him of the poison!
After painstakingly detoxifying Aunt Guo, the secret behind it was discovered!
From then on, Yang Guo roamed the world freely!
The introduction is insufficient; please proceed to the main text!