The unnamed era contained all the unknown regrets of the master, and the master and apprentice depended on each other. Wu Gu knew that she wanted to make up for the regrets of the master while she was alive. When her soul came back to Xumi, an erhu made for her by the master with all his efforts was enough. A song, a dream, and a lifetime of trance.
Intention: Don't ask who is coming, just ask what is right and wrong