Tsai said the case was the “tip of the iceberg” because similar cases have been found in the army, navy and air force in the past year.
The lawmaker urged the ministry to reclassify the confidential levels of secrets and redefine the meaning of secrets to prevent espionage cases in the future.
DPP legislators Hsu Chih-chieh (許智傑) and Chiu Chih-wei (邱志偉) said it was time for Ma to review his China policy because recent espionage cases showed that Taiwanese businesspeople and military personnel did not know how to appropriately assess cross-strait relations.
The Chinese Nationalist Party (KMT) also commented on the case.
“This has gravely endangered Taiwan’s security. It’s a shame for the military,” KMT Legislator Lin Yu-fang (林郁方) told reporters. “We demand severe punishment to deter the recurrence of such cases.”