Transmigration Upgrade Specialist

[New Artwork credits to Sleepwrite (Fellow Authors). Thank you for your great Cover!] After transmigration, Zhang Wu Ji is reincarnated into a youngster body with the same name. Their differences? Before reincarnated, he was a poor librarian that have to sleep in the library because he can't afford to rent a room. After reincarnated, he was a poor bastard that was despised by his two elder brothers because he was born with a worthless Martial Constitution. But as a Transmigrator, he possessed a special System, [Upgrade] that allows him to strengthen anything in this world. How would he fare when he will need to earn, create, upgrade, and upgrade even more to reach the peak of the world? Or chat with me in my discord: https://discord.gg/df3jZzs (I am still new with this so it may be a little boring here) If you're feeling boredom from waiting for this novel, do check my other slower novel named [Last Fortress of Humanity] where adult content is pretty much happening there too. Please support me as much as you can, if you enjoy reading my humble piece of work. Most Recent Note: 1. I'm trying to promise 7 chapters weekly, with a more daring try to add seven bonus chapter based on the number of power stones and the spot I stand in every week. - 2. Chapter's length reduces from 3k words to 2k words to shorten the delay and lighten my burden in trying to fulfill the number of words each chapter. - 3. English is not my first language, so please forgive me for my broken grammar and lack of descriptive sentences when you're enjoying my novel. - 4. Last but not least, please support me by giving me a good review, a comment, and approach me for any question or correcting my mistake. I'm sorry I have no time to read the comments on earlier chapters, thus I might miss some comments there. As long the Support is positive, I will promise that this novel will not be dropped. If it's possible, I will try my best making this a minimum 900 - 1200 chapters Novel.