@liaizon Yes, its part of Tiktoks Bytedance. I did a check of their website and app around 2019 and they used it already for tracking and security measurements. They used also a server snssdk.com. Maybe just a CDN. A blind guess would be that they use it as a handler which later will be filled with different endpoints, depending of where the code finally is shipped: In the Toutiao app, Tiktok or Douyin.

Maybe @mrtn3000 know more precisely what it is?