When will Taiwan Province Province open mainland tourism?

According to China Times of Taiwan Province Province, in 2008, Taiwan Province Province opened up group tours for mainland residents to Taiwan, with a Taiwanese certificate+a group tour endorsement issued by the mainland and an "entry permit" issued by Taiwan Province Province.

Taiwan Province Province, referred to as "Taiwan Province" for short, is a provincial administrative region of People's Republic of China (PRC), with Taibei as its capital. It is located on the continental shelf along the southeast coast of Chinese mainland, bordering the Pacific Ocean in the east, Fujian Province across the Taiwan Province Strait in the west and the Philippine Islands in the south.