My PIXIV link:
https://www.pixiv.net/users/76094070
Because of the Xiao character, he has so many details, such as the tattoos on his body and the jewelry he wears, so I used LoHa( info: https://github.com/KohakuBlueleaf/LyCORIS ) to train the lora, and I think the restoration is quite good.
You don't even need to use a prompt like best quality，masterpiece, he came out quite well, you can click on my other images to see the information.
Here are some results.