Old Du's full name is Du Biao. He's 65 years old, a few years younger than Old Master Tong, but he looks quite old.
A rural soldier, he managed to become a regiment commander after ten years of crawling through cat ear holes in the Southwest. However, because he was uneducated and "had a screw loose," he was relegated to the most dangerous department of the Southwest Police.
The old guy joined the army as soon as he came of age, and the flames of war in the Southwest ignited a fervor in him that hasn't extinguished even now.
That kind of "fervor" is like a perpetual motion machine. Once ignited, your body's instincts will tell you what is truly meaningful, and once you're removed from a familiar environment, you become uncomfortable in all sorts of ways.
Joe Ga is the same kind of person, so he completely understands the transformation in Old Du's spirit and energy!
