I just started to form the habit to write down the first four numbers of Renminbi note the first week of this year, the news of fake Renmibi note came out.
I never saw a HD90 note yet. It is pretty famous. Yesterday, we chatted that some people offered 360 RMB for a fake note, just to keep something special.
This event may serve as a PR for the numbers of RMB. The numbers on the note turned out to be meaningless – just as the serial number of CPU – the only thing for sure is, the numbers are unique.