NSA whistleblower Edward Snowden revealed the truth, that the NSA hacks into China’s mobile operators to steal millions of text messages. According to Snowden, U.S. spies had hacked 3 major mobile phone companies in China and a core network to steal text messages of millions of Chinese citizens. In the first five months of 2013 there were 13, 408 virus attacks that hacked about 5.63 million of Chinese central units. According to information provided by the Coordination Center of Emergency Technical Response to national computing network in China.
Source: https://thehackernews.com/2013/06/nsa-hacks-into-3-major-chinese.html