Blizzard recently published in the official forum blue post said "Panda mystery" several new weapon enchant chance to trigger increased 5.1. Enchant Weapon - giant statues chance to trigger more will reach 6 times per minute. (1)

Enchant Weapon - Wugang and Enchant Weapon - jade. Chance to trigger will be changed to true PPM;
Enchant Weapon - the chant chance to trigger will be changed to four real PPM;
Enchant Weapon - the Colossus chance to trigger will be changed to 6 true PPM.
What is PPM?
ppm stands procs per minute, every minute trigger rate.
Means per minute trigger once. This is mainly directed against the Department of Physics. The Windsong Is the legal systems of the physical universal, so this pattern may be taken.
The general mage familiar with the built-in cd is similar to this: 20% of the trigger, the built-cd90 seconds. This is fixed, no matter what how the equipment, to maintain this property,
ppm and haste will. Such as the frequency of your attack is 1 in 2 seconds, then attacked 30 times within 60 seconds, to 30 attacks in order to trigger once each attack triggered the probability is 3.3%. However, above these are the Physics Department, they ppm calculated on the basis of the speed of the weapon, to improve rapid increase these effects coverage, because rapid and weapons speed are two different properties.