I had issues getting my littleskin skin to show up, even after putting it at the top of the priority list, after some experimentation I found out it was because the config file requests "littlesk.in" instead of Littleskin.cn

Yes, https://littlesk.in is a domain that dedicated to redirects. For users in mainland of China, it will redirect to https://mcskin.littleservice.cn, and for other users, it will redirect to https://littleskin.cn.
The reason for this design is that users often don’t know the difference between the two URLs and use the wrong URL, which cause some problems when accessing the website.

@tnqzh123