At the Beginning of the Three Kingdoms, a Five-Year-Old Undercover Shocked Cao Ying

In 194, Cao Cao was fighting fiercely with Lu Bu and was surrounded. Several soldiers walked into the tent carrying a sack and said they had caught a spy. Cao Cao became angry, and I was surrounded. Instead, the enemy's spies got in, and called for someone to drag him out and chop him. After the sacks were removed, the generals in the tent were all dumbfounded - a fair little boy with bushy eyebrows and big eyes like a porcelain doll, who looked about five or six years old. Is this called a spy? Cao Cao was stunned. Whose child?