About the Time I Traveled Across the World to Build a Gundam

Hmm... This, the system about the protagonist is just an auxiliary tool. In fact, if I write this, it is to assist the protagonist, or to provide the ability to travel through time. The system will not be too buggy, otherwise it will be cheated. Invincible, I am too lazy to write about the process of time travel, so I will say this much, and the update time is uncertain. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.