With reference to the previous question I posed, where can I find and what is the format of the LOT number? There are only the barcode and the serial number, the expiration date and the code AK011 on the package I received (as can be seen in the following image). For more information, I purchased the item from a company called Barunson which is located in Gyeonggido, Korean (바른손 - 1층, 745 충부대로, 기흥구, 용인시, 경기도).