Once relied on traditional manufacturing industry, the approval of Southern Taiwan Science Park in 1995 transformed the region into a major high-tech industrial hub. Opto electronics, integrated circuits, green energy and biotechnology are the dominant industry in the park; prominent companies are Chimei-Innolux Corp., United Microelectronics Corp. and TSMC. With the establishment of Tainan Technology Park, Shugu (Tree Valley) LCD Park and Yonkang Technology Park, the city now becomes a major center for opto electronics industry in Taiwan with a completed supply chain. Tainan also plays an important role on Auto parts, food processing, textile, plastics and other traditional manufacturing. Most notable companies including the Uni-president Corp., Chimei Corp. and Tainan Spinning Ltd., of which they also headquarters in the city. Overall, industrial production accounted for 62.6% of the gross city product in 2010.
Agriculture is important to the city especially the River North Region. While fishery and fish farming signifies the coastal districts, rice and fruit farms shaped the landscape of the inland agriculture region. The city is famous for its milk fish, oyster, rice, mango, sugar cane, pomelo, pineapple and lotus seed. Once a dominant industry, salt and sugar production are now declined to almost non-existence. Taiyen (Taiwan salt) co. and Taiwan Sugar Corp., both headquartered in Tainan, now transformed to businesses in biotechnology, quality agriculture, retail and tourism. Among those businesses, orchid farming is the most symbolic for its well-known brand name in the florist world. A nationally founded special plantation district with R&D resources is established in Houbi District.
Tourism is an industry with increasing importance. As the first capital of Taiwan, the wealth resource of cultural heritages and its potential is currently under exploration. In 2010, there were 3.5 million tourist visitors to the city, mostly domestic. There
