I Summoned Long Aotian from Another World to Build Infrastructure

Time travel+magic+system+mall+summoning+infrastructure Ma Li is a recent college graduate in the 21st century who once traveled through time and became the new city lord in the magical world. In addition to inheriting the barren town, he also received an additional debt of tens of millions of gold coins and a city full of residents who opened their mouths to eat. Mermaids reported water pollution, dwarves complained that they had no shelter, orcs complained that they couldn't afford food, and elves ran away from their families because of greening issues. What's even worse is that the enemy comes to the door to make a fight, and a big dragon comes up and spits fireballs at the city! Who can bear it? Fortunately, the road is endless, Ma Li awakened the town system, and with a wave of her hand, extraterrestrial visitors appeared one after another in the town. The beautiful swordsman leader? Slay the dragon and become a knight! A subjugated prince who died for his country? Start a business and get a title! Interstellar scrapped nanny robot? In charge of logistics, seal the general manager! Later, the city turned into a super city, and the residents suddenly realized that there was no one around who could fight. So what are you waiting for? Support the coronation of the great Queen Mary! When the residents held the Queen's new clothes and begged on their knees, Ma Li smiled evilly. Wouldn't you just lead the whole people to get rich? Sprinkle some water!