A question about '_C'

Hi, friends, I’m a complete novice at UE4. There was a problem I encountered before but I had solved, but a question still confuses me.
Here’s two line of codes.


	static ConstructorHelpers::FClassFinder<UAnimInstance> animclass(TEXT("AnimBlueprint'/Game/SkeletonModel/02/Anim02.Anim02'"));
	static ConstructorHelpers::FClassFinder<UAnimInstance> animclass(TEXT("AnimBlueprint'/Game/SkeletonModel/02/Anim02.Anim02_C'"));

As you can see, The second line of code which the ‘_C’ was added to the end of string works well… I can’t understand it… What’s the meaing of the ‘_C’? Could you help me? thank you very much!

it was solved completely