According to Snowden, the NSA has engaged in more than 61,000 hacking operations worldwide, including hundreds aimed at Chinese targets. Among the targets were universities, businesses and public officials.
The interview was the first time Snowden has surfaced publicly since he acknowledged in interviews with the Washington Post and Britain's Guardian newspaper Sunday that he was responsible for disclosing classified documents outlining extensive U.S. surveillance efforts in the United States.
Senior American officials have accused China of hacking into U.S. military and business computers.
Snowden's claims of extensive U.S. hacking of Chinese computers tracks assertions made repeatedly by senior Chinese government officials that they are victims of similar cyber-intrusions.
Snowden's claims could not be verified.
In the interview with the Morning Post posted online Wednesday, Snowden said he stood by his decision to seek asylum in Hong Kong, a semiautonomous city, after leaking documents about a high-level U.S. surveillance program.
"People who think I made a mistake in picking Hong Kong as a location misunderstood my intentions," he said in the interview. "I am not here to hide from justice; I am here to reveal criminality."
He added, "I have had many opportunities to flee HK, but I would rather stay and fight the United States government in the courts, because I have faith in Hong Kong's rule of law."
By speaking with Hong Kong's oldest English-language newspaper, Snowden seemed to be directly addressing the city he has chosen as his safe harbor. And by disclosing that he possesses documents that he says describe U.S. hacking against China, he appeared to be trying to win support from the Chinese government.