The Star River Giant Beast Alliance was an organization that Lin Zhen had joined when he was in the New World.
Even when he first arrived in the Original World, he was still part of the Star River Giant Beast Alliance.
However, when Lin Zhen was in the Original World, he had another status: a student of the Falling Star Lake Holy Land. This status didn't conflict with the Star River Giant Beast Alliance, and he even became the chief of the Fire Kirin clan.
Later, as he became a Holy Land Resident and had no more rivals in the Original World, he gradually lost touch with the Alliance.
But his membership in the alliance still remained. Lin Zhen was still part of the Star River Giant Beast Alliance.
Neither the Original World nor Witch Star attempted to contact him, as it was unnecessary. However, now that he had arrived at the Star Sea, he immediately received news from the Alliance.