Taiwanese political staffers of both the ruling Democratic Progressive Party (DPP) and opposition Kuomintang (KMT) are being rounded up and prosecuted as part of a nationwide anti-espionage effort.

Four members of staff in the DPP were charged on Tuesday with spying for the Chinese Communist Party, according to the Taipei Times.

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One suspect is Huang Chu-jung, a former assistant to New Taipei City Councilor Lee Yu-tien. The High Prosecutors’ Office is charging Huang with “developing a criminal organization” for the CCP after allegedly being recruited for intelligence gathering on a business trip in 2017.

He faces a minimum sentence of 18 years and six months if convicted.

Huang allegedly conspired with co-defendants Chiu Shih-yuan at the Taiwan Institute for Democracy, National Security Council assistant Ho Jen-chieh, and Presidential Office consultant Wu Shang-yu.

Authorities say the individuals variously leaked sensitive government information back to the mainland and participated in money laundering schemes, communicating state secrets back to handlers via a messaging app.

Prosecutors are seeking a minimum nine-year sentence for Ho, eight years for Chiu, and five years for Wu.

Chiu and Wu have confessed, while Huang and Ho maintain their innocence.

The DPP is not the only party with suspected threats to national security lurking among its ranks.

Local reports show multiple members of the KMT have been rounded up by the Taipei District Prosecutors’ Office this week.

Lin Yueh-lung, a suspect who previously served as an assistant to multiple high-level KMT legislators, was released on bail Wednesday morning. He is accused of passing along confidential government information in exchange for payments.

Authorities say their investigation implicates former Keelung city councilor aide Wang Kai-min and Kuo Wen-pin, a former senior executive officer in the Presidential Office of Chen Shui-bian — however, both suspects were released without bail.

KMT Chairman Eric Chu vowed in a Wednesday speech to take a “zero tolerance” approach to members of the party found to be working with the mainland.

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Most suspects in cases related to Chinese espionage are being prosecuted under the National Security Act.

According to the Guardian, approximately 64 people were prosecuted in 2024 on charges related to foreign espionage, many of them current or former members of the armed forces.

China’s explicit aspirations to invade and annex the island nation heighten the sense of urgency in protecting state secrets from malicious actors within the country.