They have strategically placed 3D QR code sculptures at different places in Seoul. These QR codes can only be scanned between 12 and 1pm, because during this time the sunlight is such, that the shadows reflected on the sculpture completes the QR code, making it scannable.
Those who are able to successfully scan the QR code are given exclusive discounts (up to 25%) at the Emart store, purchases can be made directly using a smartphone. The reason for putting up Sunny Sale between 12 and 1pm is to enhance sales during lunchtimes.
