After reviewing the relevant video tutorials, I found that the custom facial editing function of Metahuman has a relatively limited adjustment range, which does not match the effect I wanted for the character model. After asking Serra’s guidance in the class, I learned a way to achieve a stylized Metahuman. This is the most convenient method for beginners that I have learned. Import the model into UE, create the Metahuman Identity, and then use this Identity to create the Metahuman Character.
In order to prepare for the creation of Metahuman Identity, I delved into the details of the model and placed the model at the collarbone of the character to facilitate the identification by the internal plugins of UE5.