The Kingdom Falls in Three Days, and You're Giving Me the Throne?

About the story

Xiao Yan transmigrates into the third prince of Da Gan. His imperial father empties the treasury and flees, eighteen feudal lords are poised to destroy the kingdom in three days, and the civil and military officials are all waiting to watch this useless prince lose the realm. Instead, he makes explosives, trains a new army, and recruits mighty generals. He establishes the Da Gan Imperial Academy of Sciences and uses modern scientific and technological knowledge to build an invincible force, expand his territory, and bring the realm to order. Whoever comes, no one is taking this throne back!!