A total of 65.6 percent of the MP3 players in China have quality defects according to the Ministry of Information Industry.The ministry examined 32 types of MP3 players produced by 32 electronics companies in Beijing and Shanghai municipalities and Jiangsu, Guangdong, Anhui and Sichuan provinces in 2006 and found that only 11 products met standards. The remaining 21 MP3 players had poor sound quality as they failed to reproduce audible frequencies at the same volume at which they were recorded.
It was found that the power adapters of some players did not meet national standards on safety and electromagnetic compatibility. The selected 32 electronics makers produced 60 percent of all the MP3 players in China.