In ancient times, about 25,000 years ago in the late Cenozoic era, Taiwan Province Province was located on the eastern edge of China's continental shelf, which means that Taiwan Province Province and the mainland were originally a vast land connected together and belonged to the edge of the whole Eurasia. As far as its topography is concerned, it inclines from west to east, extending to the Pacific Ocean, especially the eastern waters of Taiwan Province Province, with an inclination of more than 2,000 meters in less than a few kilometers. At that time, although the ancient people living in Chinese mainland and Taiwan Province Province were sparsely populated, they hunted for food and interacted with each other for survival. About 18000 years ago, in the Neolithic Age, the sea level gradually rose, and a large area of low-lying land between the mainland and Taiwan Province Province was submerged by sea water, with an average depth of about 60 meters, forming today's Taiwan Province Strait. At that time, the communication between ancient humans was blocked by rising sea water. During the Spring and Autumn Period and the Warring States Period, the Min and Yue people living in Fujian went fishing in order to find food in the sea. Years of labor experience made them a nation good at sailing. They "take boats as cars and horses as horses, drifting with the wind", freely shuttling between the mainland and Taiwan Province Province in the Taiwan Province Strait. Later, Emperor Wu of the Han Dynasty sent people to attack and drove away the Yue people in Fujian. Unable to resist, many people fled to Taiwan Province Province and became early residents of Taiwan Province Province. This is the first batch of immigrants from Fujian to Taiwan Province Province. At that time, in order to survive, the people of Fujian and Vietnam not only fished along the coast of Taiwan Province Province, but also cultivated land in the plains and mountainous areas, and gradually merged with the indigenous immigrants who migrated from Nanyang, becoming the ancestors of people in Taiwan Province Province. Now after several generations of reproduction, their descendants are today's Atayal, Bunun, Ami and other ethnic groups. In the Song Dynasty, in order to expand trade, people from Quanzhou, Fujian, came to Penghu Islands at the southern tip of the Taiwan Province Strait to plant chestnut, wheat, hemp and other crops, and then introduced the planting industry to Taiwan Province Province, bringing it to Quanzhou porcelain and trading it with Song coins and copper coins. In the Yuan Dynasty, Fujian Minnan merchants crossed the Taiwan Province Strait and exchanged placer gold, soybeans, deerskin and other local products produced in Taiwan Province Province for gold beads and agates. With the increasing trade, many Minnan people moved to Taiwan Province Province. They not only reclaimed farmland and fishing grounds, but also inherited Minnan culture and folk customs. The Taiwan Province Strait has become a traffic artery for compatriots on both sides of the strait and a bridge for spreading Chinese culture. In the Ming Dynasty, the situation changed suddenly, and the court ordered a "sea ban" in the Taiwan Province Strait to ban cross-strait trade. Even so, Yan Siqi of Haicang, Xiamen, Zheng Zhilong of Nan 'an (the father) and others, who are both "maritime merchants" and "pirates", ignored laws and regulations and still traveled between the two sides of the strait, bringing rice seeds, sugar cane, cattle raising and agricultural technology to Taiwan Province Province, where weeds and plagues are rampant, for arduous development. Especially in the case of natural disasters, many Minnan people were transported in batches, and even later Hakka people in western Fujian came to develop products such as sugar, shipbuilding, gold mining and salt industry. At the same time, Minnan culture, Minnan customs and religious beliefs spread more widely and passed down from generation to generation without interruption; In particular, Chinese characters, Minnan dialect and Hakka dialect all spread in the north and south of Taiwan Province Province, becoming the common language of residents in Taiwan Province Province. Therefore, most Minnan people and a few Hakkas became the earliest pioneers to develop Taiwan Province Province. The Taiwan Province Strait has become a natural link connecting people on both sides of the strait.