My Genius Sister is Only Seven!?

My Genius Sister is Only Seven!? novel:

The country girl, Emily, was an orphan. She survived off the scraps that she could find from families around her. Every one of them despised her.
One day, a fairy-like little brother came to the city and brought her home.
At first, Emily wasn’t popular in other people’s homes, but she quickly awakened her god-tier learning talent. She could learn pretty much anything and everything in an instant.
Soon, Emily was regarded as a child prodigy. She was proficient in all sorts of arts, including zither, chess, and calligraphy, and that’s just the tip of the iceberg.
The elders and older brothers who didn’t really like her in the past were all captivated by her and spoilt her like a little fairy.
Every day, her grandparents, parents, uncles, aunties, and brothers fought to pamper her.
Grandpa said, “Baby, can you help Grandpa take a look at this painting?”
Grandpa liked to collect oil paintings, but his deteriorating eyesight couldn’t discern good paintings from bad ones, and he kept getting tricked by sellers . So he had to consult the seven-year-old Emily because paintings that passed through Emily’s hands were never wrong.
Her father pleaded, “Baby, help me. The chairman of the Gu Site Corporation wants to get a calligraphy painting from you. This will determine whether my company can land a deal with them!”
Her brothers pleaded. “Baby, are you busy today? When are you going to visit your brother’s school? I promised the principal that I would bring you there. You can’t go back on your word.”