Time and Space Joinery: The Dual-Birth Journal of the Western Xia Astronomical Bureau

Beneath the sands of Dunhuang lie the hidden keys to the convergence of three layers of space-time. A Chen, a descendant of the Western Xia Observatory, is drawn into a crisis of temporal imbalance by accident, armed only with the Double Birthday Diary his father left behind.

A mysterious girl appears out of nowhere with a star-vein mechanical watch. The patterns on its face can activate the origin point of space-time, while the mark on her collarbone proves her ancestral bloodline. The two join forces with void craftsmen from the upper layer and mirror messengers from the lower layer. From the tomb guardians’ siege to the energy devourers breaking through the boundaries, from seeking a compass in Kunlun to sealing rifts beyond the world, they shoulder the duty of protecting all three layers with mortal bodies.

Several confidantes also stand by their side, helping crack ancient formations and face powerful enemies. Only when the Symbiosis Bell rings across the three realms does A Chen understand: what his father left behind was more than a diary. It was his ultimate destiny, to wield the mortise and tenon of space-time and forge a peaceful civilization!