Why are you seeing more and more people with round faces and plump figures on the streets of China? Those who clearly have a high-carbohydrate diet are not necessarily wealthy; but when you see someone with a well-proportioned figure, refined lines, and obviously consuming a large amount of high-quality protein, it often means they have better economic conditions. Because in most countries around the world, people with lower incomes typically have a diet structure dominated by cheap staple carbohydrates, while those with better economic conditions can more easily access higher-cost protein sources like meat and dairy. Just as herbivores mainly consume plants and predators eat meat, human dietary structures also reflect resource acquisition ability to some extent: protein is more conducive to maintaining muscle, while excessive carbohydrates are more easily converted into fat storage.