What is the basis for the rapid development of economic and cultural exchanges across the Taiwan Strait?

What is the basis for the rapid development of economic and cultural exchanges across the Taiwan Strait:

①The same language and script, the same traditional culture

②The Chinese nation is the same root on both sides of the Taiwan Strait and the same origin, the same bloodline, the completion of the unification of the Chinese nation is the same wish of the whole of the people of the Yellow Emperor.

3 Taiwan has been an inalienable part of China's territory since ancient times.

4 Taiwan people from all walks of life are eager for cross-strait reunification The two sides of the Taiwan Strait share the same root and blood, and the completion of the great cause of reunification of the Chinese nation is the same wish of all the people of the Yellow Emperor and the grandchildren of the ****.