Protagonist: Yang Guang (traveler), a modern military enthusiast and a graduate student in the history department
Time: March of the 14th year of Daye (618), only 30 days left before the Jiangdu palace was assassinated in history.
Location: Jiangdu (now Yangzhou)
System: Explosive Soldier System - can summon elite troops from ancient and modern times, both at home and abroad, and produce cross-era weapons and equipment, using "military merit" as energy (obtained by killing enemies, occupying land, and shocking)
Initial crisis: The Xiaoguo Army (Yulin Army) plotted a rebellion, Yu Wenhuaji sharpened his sword, rebellions broke out all over the world, and Li Yuan captured Chang'an
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