Greetings @jiegenghua !
I see this is your very first post in our forums! Welcome to the Unreal Engine community! 
Thank you so much for sharing your submission! Your project is very picturesque! It’s as if we are watching one of those vintage, beautiful Japanese silk embroidery art pieces come to life.
This is splendid work! It’s remarkable that it had only taken you three days! What did you enjoy most when making this project? Did you have to drink plenty of caffeine to finish this in three days? Will you be making an action cinematic in the future?