It is true that the Ancient Xiong Family has indeed retreated from the world, though not as completely as the Yao Family.
However, even the Yao Family has quite a few spies in the Tianqin Plane. If a clan wishes to preserve itself through the ages, it certainly cannot cut off all channels of information.
When they trade rare resources, they might encounter some trouble, possibly being investigated, so they use the Minor Realm Wei Clan as a cover.
The covert activities of the Ancient Xiong Family in the Tianqin Plane far exceed those of the Yao Family. Although the True Sage of the Xiong Family is also close to a state of seclusion, he still comes out periodically to understand the situation, feeling confident not to fall behind the times.
