While several closer islands, such as the Penghu (or the Pescadores as they are now known), were incorporated into the Chinese polity during the period of Ming blue water exploration in the fourteenth and fifteenth centuries, Formosa (or Taiwan as it came to be known) never was.

After shuttering its large scale naval activities in the mid-fifteenth century, the Ming were thereafter largely content to let the rival trading companies of the Portuguese and Dutch quarrel for influence on Formosa, where trade revolved around tea and camphor.

In an odd bit of history repeating itself, the island first became a central focus of a ruling mainland Chinese regime as a result of a civil war that needed concluding: displaced by the invading Manchurian forces (the eventual Qing), in 1661 what remained of the Han, Ming ruling clique retreated to Formosa. It was following their ultimate defeat in 1683 that Formosa started to become ethically and administratively integrated into China (a process completed around a century later).

Despite its import as a trading hub in the centuries thereafter, when the Japanese took possession of Formosa at the end of the First Sino-Japanese War (1894-95), per the terms of the Treaty Shimonoseki (1885), the island's new rulers found a society, economy, and polity virtually untouched by modernity.

And while initially brutal, putting down an anti-Japanese insurgency of emigre Han Chinese and native Taiwanese, the Japanese colonial administration of the island, which lasted until the end of World War II, would see the island transformed into an educated, urbanized, and rationalized society with living standards far higher than on the mainland.

Despite the increasing gap, most Taiwanese, whose cultural links with the mainland were still strong, were open to rejoining mainland China when the war finally ended—although it is worth noting that this willingness proved short-lived, the Kuomintang (KMT) regime needing to viciously suppress a mass uprising against its terrible misrule in 1947.