I am only one year old, what the hell is the counterattack system?

Absurdly, a baby has crossed over into a world plagued by demons, and the reversal system shows up thirty years early.
At thirty, after enduring countless hardships, you’ve achieved nothing and are left all alone. Reward: Late Bloomer (Talent) — The older your bone age, the faster your cultivation speed.
Reversal Task: Defeat Chen Yuan, who has reached the Sixth Rank Gu Yuan Realm, within a year. Reward: Introduction to Swordsmanship.