A high level overview is at https://en.wikipedia.org/wiki/ECHELON#Concerns
The actual EU report is available at: http://www.europarl.europa.eu/sides/getDoc.do?pubRef=-//EP//...
Baseless claims won't cut it. The US has had by far the world's largest economy for the last two decades. There should be dozens of legally proven - court cases - examples of intellectual property theft far worse and larger than anything China has done, given the scale difference of the economies over that time and the supposed capacity to hoover up global communications and put it to use in industrial espionage.
Saying that well: here's one example, or here's two examples across 30 years, is not good enough to indict the world's largest and most technologically advanced economy for being rampant industrial thieves. To show a comprehensive pattern of deep industrial espionage, and to show that it isn't more along the lines of routine espionage that occurs between any two great economic powers, requires a lot more proof.
How many legally proven court cases against industrial espionage carried by the Chinese State are there?