First all max the character out. max: health, musuo, attack, and defense. Next get a decent 3 weapon. Put the game on hard or chaos (doesn't matter).
Stage:Battle of Hei Fei
Difficulty: Hard or Chaos
Parameters: Defeat Zhang Liao 4 times.
Special: Take ice orb and a high level seven star sash. Then spam Ling Tong's C4. Ling Tong has the fastest attack speed in the game so this should not be a problem. Just watch the video to see where Zhang Liao shows up and then go get him when he rolls in.