Taipei: The Supreme Court has upheld a 12-year prison sentence for a former Army sergeant convicted of leaking classified military information in exchange for financial rewards.

According to Focus Taiwan, the court dismissed Sun Chu-Chuan's appeal on July 22, finding no error in the lower court's ruling or application of the law. The sentence is now final. The case originated from Sun's service with the Army's Matsu Defense Command from June 2021 to December 2022, as detailed in an indictment by the Taiwan High Prosecutors Office.

The indictment revealed that while serving as a sergeant, Sun photographed classified state and military documents with his mobile phone and transmitted them to others in exchange for cash or cryptocurrency payments. The specific nature of the leaked information was not disclosed. At the time, Sun was experiencing financial difficulties related to debt and was persuaded to leak the information by three individuals he met on Telegram. These individuals used the aliases "Baiwei," "Yun Ge," and "Jack Jack."

Sun transmitted classified materials to these individuals on eight occasions and received NT$67,770 (US$2,096) in payments. In December 2025, the Taiwan High Prosecutors Office indicted Sun on corruption charges and related offenses.

On April 21, the Taiwan High Court found Sun guilty of accepting bribes under the Anti-Corruption Act and disclosing military documents classified as confidential under the Criminal Code of the Armed Forces. He was sentenced to 12 years in prison and deprived of his civil rights for six years. Sun later appealed the decision, but the Supreme Court upheld the sentence.