How do you get Huang Zhongs level 11 weapon in Dynasty Warriors 4 Extreme Legends?

Shoot Guan Yu off his horse before he challenges at the castle wall

(approximately 30 seconds into stage).

Defeat Zhou Cang.

Defeat Guan Ping.

Defeat Zhao Yun.

Defeat Zhang Fei.

Achieve 100 KO Count. Do this on Expert mode