Taiwan Today has the story:
The ROC Military Supreme Court sentenced former Maj. Gen. Lo Hsien-che to life imprisonment July 25 for selling secrets to mainland China and jeopardizing national security.
(Major General Lo Hsien-che image from Taiwan Today.)
SinoDaily describes the information Taiwan's Turncoat General is said to have passed along to China:
. . . documents Lo handed over to China included details of the Po Sheng (Broad Victory) command, control and communications system that Taiwan is buying from US defence contractor Lockheed Martin for US$1.6 billion.
They said Beijing is believed to be extremely interested in learning more about the project, which gives the Taiwanese military some access to US intelligence systems.
Other information leaked by Lo reportedly covered the army's procurement of 30 Boeing-made Apache AH-64D Longbow attack helicopters and the army's underground optical fibre network.
As for motive, there are some reports that Maj. Gen. Lo was seduced by a Chinese female agent. Lo, on the other hand, claims he turned traitor only after Chinese Intelligence threatened to expose damaging photos of himself in the company of Thai prostitutes, taken while he was stationed in Bangkok. (As utterly improbable as THAT scenario may sound...)
Others may speculate that he was merely doing some "eventual reunification" freelance work. As some Chinese Nationalists have occasionally been known to do.