Yes, you may encounter fake money in China. Also, Guilin can’t be ruled out. Please don't exchange money on the black market. If you are stopped by black marketeers offering a better exchange rate, please politely refuse and walk away. You can exchange the money at either banks or hotels.

When you are given currency above 20 RMB, it’s better to check the watermark, Braille dots and whether the figures on the lower-left corner change color viewed in the different angles.