Why is the height ratio of Koreans much lower than that of South Korea?

Long-term international blockade, serious shortage of domestic productivity, leading to food shortage-malnutrition, indirectly affecting development. Another possibility is the genetic difference between North and South. You see, China generally describes tall and burly people as northerners, while southerners are often described as short and smart. .

Of course, Koreans are still a famous race after all, and the main reason is malnutrition.