ok well u need
A good Charicture
Lvl 4+ wepon
fight your way to Lu Bu and keep using the chage attk where u knock him up then smash him bak down keep doing that.
Tips:
equip peachock urn tortoise ammy and attk ammy and true musou scroll(if u have it)
(hed this tip with utmost respect coz i have 2 really good edit charictures and lots of people with there 10th lvl weps).
PS:Enjoy killing him (note: he only drops lvl 2-4 swords)

WHEN YOU ARE LOW ON HEALTH RUN FROM LUBU WHEN YORE MOUSOU GAUGE FILLS UP DISH IT OUT CONTINUE THIS ACT UNTIL HE IS DEFEATED.(THIS CAN ONLY BE DONE ON RED HEALTH)

my sun ce and x dun could own him 8 hits

how do you beat the whole game and get all of the chartiars?

if your at the battle at hu lao gate he is nearly impossible to kill so just let your
troops handle him while you kill the enemy commander.