I bought the above Nian Gao before Chinese New Year at Chinatown, they have Factory made and Homemade, I chose the Homemade and it cost me $5.50.
The guy selling me taught me, if I do not want to cook and want to keep for sometimes, cut into piece and keep in the fridge. I coat it with a beaten egg with some flour. I accidentally pour out too much flour and also I didn't watch the fire, it was a bit burnt.