Greetings @NG_YU_FEI!
Welcome to the Unreal Engine Community! 
Just so you’re aware, I’ve had to move this topic from the Community - Showcase - Work in Progress forum to the Character & Animation forum. I added the optional tags “character” and “groom” for you.
The Showcase - Work in Progress forum is for developers and artists to show off their current projects. Troubleshooting questions are more applicable to our other forum topics.
Please remember, when posting, be sure to review the categories to ensure your topic is posted in the most relevant space.
I wish you the best of luck in resolving the issues you are experiencing with your character blueprint! Enjoy the remainder of your week!
'- Your Friendly Neighborhood Moderator 