Fan

A fan, comprising:

• a cage;
• a first fan blade;
• a second fan blade;
• a driving module;
• a first air guide piece;
• and
• a second air guide piece;
• wherein the cage is of a hollow structure, partition plates are disposed in the cage to divide the cage into a first mounting area and a second mounting area, the first fan blade is disposed in the first mounting area, the second fan blade is disposed in the second mounting area, and the first fan blade is disposed opposite to the second fan blade;
• wherein the driving module is disposed on the partition plates to drive the first fan blade and the second fan blade to rotate, the partition plates are respectively connected to the first air guide piece and the second air guide piece, an air guide surface of the first air guide piece faces the first fan blade, and an air guide surface of the second air guide piece faces the second fan blade.