Dynasty Warriors 3: 4th Weapon Guide - Sun Quan

This is a guide in order to obtain the 4th weapon for Sun Quan, in Dynasty Warriors 3.
Weapon Name: Master Wolf
Base Attack: +42
Element: None
Other stats:
Musou Max: +68
Attack: +22
Bow Attack: +49
Bow Defence: +50
Musou Charge: +26
Requirements:
Stage: The Seige of He Fei Castle (Original Mode) - Wu Forces
Defeat Zhang He. Weapon Box appears on the east side of the central island in the castle.
Other notes:
Another case of a simple requirement in a tough stage. He Fei Castle is the final stage of a lot of Wu general Musou Modes, so it can be a problem if not dealt with properly. Zhang He is located in the castle's central area, near the gates bordering the entrance courtyard, so it requires some effort to get to.
Some time into the battle, Man Chong and Cao Rui appear as reinforcements in the south east. They appear sooner if you approach Sima Yi's location, but either way they won't cause you much of a problem as they are too far south to get in your way.
Allow yourself to take some time with this stage, as it can be pretty tricky for your forces to survive if you want to bring them along for the ride. Intercepting the reinforcements gives you an easier time too, as they won't be able to pincer with Sima Yi's ambush unit. Requires a lot more running around, but gives you that level of protection with your allied troops.