I Build Mechas in the Demon Suppression Division

[The soul of a mechanical graduate student travels through troubled times and shakes the world with his machine skills! Yun Che traveled to the Xuanyao Dynasty and became an abandoned son of the family. In this world, the dynasty is decayed, surrounded by monsters, and the powerful enemy Chiyuan Kingdom uses monsters as soldiers, and all life is in ruins. Fortunately, he awakened the ancient artifact [Tiangong Box], which contained endless machine blueprints. From a humble concubine to the head of the Demon Suppression Division, he relied on modern thinking and ancient mechanism skills to solve the problem: Wooden armor and fireflies detect the enemy's situation, giant war weapons guard the border, and the brilliant machine city protects the last capital of the human race! However, his old enemy, Li Qianpo, who is also a time traveler, has bound the bloody system [Ten Thousand Bones Spectrum] to devouring living beings to create an army of demons, vowing to destroy everything. A duel between two heroes, a collision of ideas! Is it to create and protect, or to plunder and destroy? Above the court, the third princess Yaoli carries the secret of spiritual blood. The imperial road is bumpy. Who can take charge of the world? Let's see how Yun Che uses his machine skills to wipe out the evil spirits in the world, assists the empress, and creates a new glorious era!