TOLEDO, Ohio, Sept. 29 (UPI) -- Chinese-born human rights activist Harry Wu told a University of Toledo audience he never sold Chinese state secrets, and called his 66-day incarceration in China a form of "mental torture".

Wu used photos he took outside of Chinese prison facilities as part of a Thursday night presentation to an audience of about 200 people.

The pictures were among those that were broadcast by U.S. and British television stations to document the kind of slave labor camp that Wu said he was held in between 1960 and 1979.

"If this picture is a state secret, then all the people on the streets should have to close their eyes," Wu said.

Wu was arrested when he tried to enter China June 16 and his detention for 66 days nearly kept U.S. First Lady Hillary Clinton from attending a U.N. Women's Conference held in Beijing.

Under pressure from the Clinton administration and members of Congress, Wu was deported last month, but only after a Chinese court convicted him of revealing state secrets, and then suspended a 15-year prison term.

The 58-year old Chinese-born U.S. citizen said he was never physically abused while in detention, but was held in a 9-foot by 12- foot (3 by 4-meter) room, and watched over by guards 24 hours a day.

He was interrogated once a day for not more than five hours, but Wu said his guards were under strict orders not to speak to him except to give him orders.

Wu said he does not support trade sanctions against China, but wants Americans to boycott companies that buy products from Chinese slave labor camps.

Wu was paid $6,000 for his appearance, which was sponsored by the University of Toledo's office of multicultural student development.