Is This Time Traveler Too Cautious?

Five years after traveling to a parallel world, he has nothing but his five all-powerful "ex-girlfriends" Qin Yanjun who have achieved top achievements in different fields. Starting a business? Make money? Become the richest man in the world? No! If you are too high-profile before laying a solid foundation, you will die miserably! I am not the protagonist of the novel, just an ordinary time traveler. Making money is not as good as picking up girls! If we stay together, we will change our tastes regularly and become a scumbag. Until one day. He heard a metallic sound coming from the void. "Congratulations on becoming the only 'chief evaluator' of Future Technology Company on Aquablue Star!" The products reviewed are: neuron computer/nuclear fusion perpetual motion machine/weather controller/invisibility cloak/galaxy jump spacecraft/Sky City/Black Domain/Two-way Foil/Black Hole Weapon/Singularity Weapon/ Since then, the world has undergone earth-shaking changes because of an extremely cautious person! "Chief Evaluator!... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.