Complex sentence: The old man is a former soldier in the Qi Family Army, and when he learns of Tanzhi's true identity, he decides to allow the boy to proceed with his journey, much to his granddaughter's dismay.
Split into simpler sentences: The old man is a former soldier in the Qi Family Army. When he learns of Tanzhi's true identity, he decides to allow the boy to proceed with his journey, much to his granddaughter's dismay.