Falling into a Bygone Era

"Where am I?" "Lady Yue, I just told you, you're at home." "No! I mean, what region, country, or whatever you call this? What's the date, and who's the ruler?" "Lady Yue, are you okay?" She reached out to feel my forehead, as if I had a fever. "Just answer my question!" "This is Su Zhou. The year is 643, and we are all under the rule of Emperor Su." "Su Heng!!" Did I travel back to the Su Dynasty? This is crazy! I must be losing my mind! How am I going to get back? That stone! Maybe if I can get it to glow again, then I can return to my time period! I got up and rushed to the altar.