Serving the Emperors of Every Era as Their Guardian Beast

Also known as The Ferocious Dragon Sells Cuteness Online, Helping Qin Shi Huang/Han Wudi/Emperor Taizong of Tang Unite the World, and Back to the Jurassic

Late in the Cretaceous period, an asteroid strikes Earth, changing the planet's ecology and causing the extinction of countless dinosaurs.

Wali, leader of the dinosaur kingdom, decides to lead her people elsewhere.

But the planet they live on is no longer suitable for dinosaurs. Where should they go?

Then Wali remembers the “Famous Ministers and Great Generals System” she abandoned.

When she first realized she'd been reborn as a Triceratops, she'd figured the System was about as useful as junk.

She was already a prehistoric giant beast. What was the point of farming Qin Shi Huang, Han Wudi, or Emperor Taizong of Tang?

By the time humans came around, dinosaurs would have been extinct for more than sixty million years!

But now Wali has no choice but to consider the odds of mooching food from two-legged beasts.

She looks at the Tyrannosaurus behind her, jaws gaping wide; the enormous Triceratops; and the Quetzalcoatlus, with a wingspan of over ten meters. She starts to fret.

Her whole group looks like a pack of fierce beasts. How can she pass them off as auspicious creatures and get her dragons appointed to official posts under emperors throughout the dynasties?

Please note:

1. This is an alternate world with fictional history. Please don't nitpick historical accuracy.

2. The protagonist's goal is to find a suitable place for her people to live. The dragons won't stay in the human world, and will eventually return to the Jurassic.

Theme: Never give up hope, even when you're trapped in a desperate situation.