This photo brought back fond memories when I was growing up in Tsuen Wan, Hong Kong. We did not even have refrigeration then. Every morning you had to go to the market to get fresh vegetables and meat for the day's meals. Leftover from lunch would be stored in a cabinet with a mesh door to keep the bugs out yet allowed air circulation. At room temperature. It could be up to 90+ degrees during the summer months. At night the leftover would be steamed and stir fried again, to be eaten with the dinner dishes. No one ever got sick from food poisoning nor spoilage. Then you repeated the next day shopping for everything fresh again.