While other people traveled through time and massacred everyone, Lin Xingchen's time-traveling involved washing and cooking, not having enough to eat and clothing, and even being poisoned and thrown into the sea by his evil sister.
Fortunately, the belated golden finger turned Lin Xingchen into a mermaid and survived.
Unfortunately, she has a phobia of the deep.
Fortunately, a passing authentic shark picked her up.
Purpose: Life is equal