Most Taiwanese investment on the mainland is made through offshore shell companies, many based in Hong Kong.
China also benefits from billions of dollars in Taiwanese investments.
Indeed, billions of dollars of Taiwanese investment still flows onto the mainland.
Total Taiwanese investment in the mainland is estimated at 13 billion dollars, involving some 3,000 plants.
Taiwanese investment has been flowing into the mainland since the early 1980s, but in the past year the flow has become a flood.
In order to attract Taiwanese investment, the province intends to increase its rail length by 50 percent to 2,500 kilometers.
Economic integration, particularly Taiwanese investment in high-tech industries on the mainland, have raised the cost of any conflict.
India is also keen to attract Taiwanese investment particularly in hi-tech and labour intensive industries.
He also said he would consider lifting strict limits on Taiwanese investment on the mainland.
Taiwanese investments in Africa are about $500 million a year, while Chinese Eximbank alone is approaching $20 billion over 3 years.