When making your sugar and yeast liquid, add a couple of tablespoons of white vinegar, this is enough acid to stop bread from growing mould before it is eaten, assuming you make delicious bread in the first place.
I started making my own bread so I could cut the sugar content (using artificcial sugar) and halve the salt content too... I add carraway seeds ...
Your berries may already have mold spores on their outsides. If you kill the spores before refrigerating the berries, they should last longer.
This source recommends submerging your berries in a bath of 1 cup vinegar + 3 cups water, then draining and thoroughly drying them in a salad spinner lined with paper towels. Then they recommend storing them in a wide,...
Perhaps you should take them out of the paper bag?
Punnets are open to promote ventilation, and by leaving the paper bag you might be accumulating too much moisture from the fridge, accelerating the spoilage of the strawberries.
Century eggs are a preserved food. Unopened, they can last for a very long time, possibly years, without refrigeration. They are sold at my "local" Asian supermarket in the dry stock aisles. Once opened you can keep them in the refrigerator for a few days. Or make chok or congee and have the left overs for breakfast.
To preserve your beans more than a couple of days, you can either pressure can or freeze them. With either option, the beans will remain safe for a year or more (as long as they are stored at appropriate temperature, and the seal remains intact for pressure canned).