Major Wang Tsung-wu was sentenced yesterday by Taiwan's High Court on convictions of engaging in espionage as well as violating national intelligence and security laws.
The court provided no further details, citing national security restrictions.
Local media reported how Wang was allegedly turned by China when he was sent there as an undercover agent for Taiwan's Military Intelligence Bureau around 20 years ago.
He spied for Beijing for more than a decade, reports said.
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Lin had travelled to Singapore and Malaysia to meet with Chinese intelligence and passed on information about the identities of the Taiwan bureau's officers and their missions, Taipei-based Liberty Times reported.
Wang was paid around USD 96,000 while Lin received about USD 76,000 for the information they passed, it added.
Lin received a six-year jail term for violating national intelligence law, the High Court said.
It is the latest in a string of espionage cases and comes as ties between Taiwan and China turn increasingly frosty since Beijing-sceptic President Tsai Ing-wen took office in May.
Taiwan and China have spied on each other ever since they split in 1949 at the end of a civil war. Beijing still regards the self-ruled island as part of its territory awaiting reunification, by force if necessary.
In 2011, an army general who headed an intelligence unit was sentenced to life for spying for China, in one of Taiwan's worst espionage scandals.
That sentence came despite a rapprochement between Taiwan and China under then-president Ma Ying-jeou of the Beijing-friendly Kuomintang party.
The major-general received a sentence of two years and 10 months.