Global Disaster: Unlimited Upgrades for My Items

[Pure natural disaster/hoarding supplies/gou/shelter/multiple female protagonists] The apocalypse is coming, mankind is in catastrophe, and tens of billions of people are dead. In his previous life, Mu Fan hid in a corporate shelter. There was a lack of supplies in the shelter, and his unscrupulous boss forced him to go out to search for supplies in the name of exercising his abilities. As a result, he was killed by radiation as soon as he stepped out of the shelter. However, he was reborn two months before the end of the world and had an item upgrade system that could upgrade everything. When everyone was fighting for a piece of bread, their heads were bleeding. Mu Fan was in his personal shelter, wondering whether to eat Chinese food or Western food today. "I, Mu Fan, love helping others the most. For no other reason than to give every lost girl a home." "Big gold chain, small watch, three small barbecue meals a day" "In the last days, if it's a tiger, let me coil up, and if it's a dragon, let me lie down!" "When you see me, Mu Fan, lower your head and speak!"