it has been closed for over twenty years, and this secret hasn't been revealed. This makes Long Xiao very curious."A technique, a set of techniques for immortality..."Long Jingguo slowly spoke."Immor...ck hole in mid-air had already vanished!"Could there actually be a spatial artifact What is this young man's identity"The man in black looked up at the sky, his face grave!Han Qing'er has already esca...