As someone who's read many detective novels and watched a lot of crime dramas, the half-baked reasoning master Yuan Bao believes that everything leaves a trace so long as it exists.
Since Sheng Xueyi lives here, she definitely has to cook daily. The kitchen is the place for cooking, and grains and flour wouldn't be stored too far from the kitchen, or they might simply be stored right in it.
The Sheng Family's villa has a large kitchen, with eight stoves arranged in two rows.
Yuan Bao found a fire poker to check the bottom of each stove.
Out of the eight stoves, only two had accumulated ashes at the bottom.
This means that during the time Sheng Xueyi lived here, only these two stoves were used.
Both stoves are large ones.
"Doesn't make sense!"
As Miss Sheng, Sheng Xueyi dresses luxuriously, her complexion is rosy, and her skin is delicate and fair, indicating that she hasn't suffered any hardship since arriving at the villa.