The storage of food According to media reports, workers at a shanghai Shenglu Food Co plant in Baoshan district relabeled buns made two days earlier with new production dates Employees added buns that were more than a week over their expiration date and had been returned by retailers back into mixers to make a batch of "new"bunsAccording to media reports, workers at a Shanghai Shenglu Food Co plant in Baoshan district relabeled buns made two days earlier with new production dates. Employees added buns that were more than a week over their expiration date and had been returned by retailers back into mixers to make a batch of "new" buns