A mainland spokeswoman confirmed on Wednesday that Tony Shih, a Taiwan academic, has been sentenced to four years in prison for espionage by a district court in Anhui province.

Shih, 60, a retired associate professor at National Taiwan Normal University, has been reportedly collecting intelligence for authorities on the island for years through academic exchange activities on mainland.

The court tried the case strictly in accordance with the law and fully guaranteed his litigation rights, said Zhu Fenglian, a spokeswoman for the State Council Taiwan Affairs Office

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On top of the four-year jail term, Shih was also deprived of his political rights for two years and had his personal property worth 20,000 yuan confiscated in the first trial, Zhu Fenglian, a spokeswoman for the State Council Taiwan Affairs Office, said at a news conference in Beijing.

The court tried the case strictly in accordance with the law and fully guaranteed his litigation rights, she said.

Other Taiwan residents suspected of spying who have been detained by the mainland include Lee Meng-chu, director of the Taiwan United Nations Alliance (a "Taiwan independence" organization), who was investigated for engaging in espionage work and intervening in Hong Kong affairs.

READ MORE: Report: 2 held in Taiwan spy case

Separately, Cheng Yu-chin, a Taiwan scholar, established a think tank in the Czech Republic and used academic exchanges as a cover to spy on the Chinese mainland and gather intelligence, according to CCTV reports.