From the Start, the System Gave Me Mecha Blueprints

Ye Qing is the head of a secret research base in Huaxia. In his previous life, he was a chief scientist in a world with technology much like today's, and was hailed as the smartest person in human history. But during an experiment, a staff member's mistake caused an explosion. When Ye Qing woke up again, he found himself in this world, reborn as a newborn baby. Drawing on the knowledge from his past life, he came first in everything from elementary school through university, graduating at just eighteen. He was then taken on as an apprentice by an old academician at the Huaxia Academy of Sciences, and from there his life went into overdrive. At twenty-one, he became the head of an SSS-grade secret research base in Huaxia, where he was the boss and answered to no one, with an unlimited supply of funding. But just as he led the development of the fifth-generation fighter jet to completion, his golden finger finally arrived, very late indeed...