Source: Flickr (top note is fake)

Fake China RMB's are so rampant that whenever you purchase something, the cashier will have to check every note in detail.

My mother got tricked into getting 2 of the fake 100 RMB notes.

You can check whether or not is it fake by

• Feeling the paper quality, fake notes are thicker
• The silver link, generally thicker and shiny
• Feel Mao's jacket, or the "100", it has an 'embossed' feeling (If I remember correctly)