Building Up the Heavenly Prison

The protagonist, Li Chang'an, is a modern civil engineering specialist who unexpectedly transmigrates into the body of history's most unfortunate crown prince. The Great Xia Dynasty he lives in is on the brink of collapse, and a "heaven-sent calamity" will strike a century from now: foreign tribes will invade, and the land will be ravaged. He is reborn at the point when it is the third day after his father, the emperor, has died and he has been thrown into the imperial prison after being framed by corrupt officials. His only golden finger is a "History Reenactment" System, which shows him warnings about major historical events and localized disasters that will happen over the next hundred years, such as "the granary on South Street will catch fire in three days" and "Qingyun County will suffer a severe drought at the start of next spring." The System's rules are simple: he must prepare a response before disaster strikes to earn the corresponding "construction points" and "reputation." Points can be exchanged for skills and supplies, while reputation unlocks warnings of a higher level. Thus begins a path of development and construction, starting in the imperial prison and turning the dynasty's fate around.