Animation aiming problem help ><

I am a noob in unreal engine and i want to design a survival game but i have some problem
First my character upperbody rotate with my camera

133604-擷取.png

However when i play the animation of attack[upperbody],the character upperbody went back to the original place,I want the character attack where he aim,so how can i fix it?

aim down:

133604-擷取.png

attack:

anyone help? thanks a lot~><