One of the symptoms of post CNY lol.
Other symptoms are low productivity (still in holiday mood) and also sick from too much food.
Although, the holiday is over but not the celebration ( CNY celebration ends on the 15th day- Chap Goh Mei). So.. EAT AWAY (and worry about fat only after that) XD
Happy New Lunar Year to all and may your new year full with happiness and prosperity.