On Wednesday, I was in Chinatown so I went to Tai Chong Kok to
buy nian gao. The people there said "sold out!" and told me to come
back again on Thursday around 8-9am. I woke up late and went there
at 11am, and again I was told "sold out!". 
I tried to wake up early on Friday and Saturday but couldn't
make it!
"early" means 6plus a.m...
Finally today I managed to wake up early. And I GOT MY NIAN GAO.

what's so special about their nian gao?