Pang Tongs 4th Weapon Help Plz

From the start, take the base in front of you to trigger the bridges over marsh thing. Then go across it to to the lower path where an officer and at the time, Meng Hou will be, kill both of them and go down the path to the armour troops. Kill the officer there, then go round the base and kill Wu Tugu.

If you kill the officer and Wu Tugu quickly enough, the task force with the explosive barrels wont arrive, but it doesnt matter. Even though they come later, you still completed the task.

After that, go back to the marsh and go towards the north killing the 2 officers right next to each other. Continue to where the beasts have come out, ignore them and take the base for Yue Ying.

After Yue Ying triggers her juggernaughts, kill King Mulu who will be on an elephant. the weapon will be in a box down the path where the 2 officers next to each other were on the way to the marsh.