What is the relationship between Ryukyu and Taiwan Province province tour?

Ryukyu became an independent kingdom in the15th century, and the Ming Dynasty paid tribute to China. From then until the Qing Dynasty, Ryukyu Kingdom and China established a vassal relationship. Most of the residents of Ryukyu Kingdom are descendants of the residents who moved to Taiwan Province Province along the Fujian coast of mainland China. Because if you are familiar with the map, you can find that Okinawa is very close to Nagano Island and Taiwan Province Province. Up to now, the islanders on that island have a strong desire to join Taiwan Province Province and get passports from Taiwan Province Province, because these people basically have the same cultural background, customs and habits, and are also related by blood. Hualien City, Taiwan Province Province, has also become a twin cities with this country, and residents of the two places often hold cultural exchanges and visit relatives and friends. As for the incorporation of Ryukyu Islands (called Okinawa in Japan) into Japan, it was actually caused by Japan's forced occupation in 1879. After the Japanese occupied Ryukyu, they enslaved the local residents and forced the Japanese way of life. Up to now, most of the Okinawa Islands are Japanese immigrants, some indigenous people have fled to Taiwan Province Province, and some people have moved to Fujian Province in Chinese mainland to remain anonymous. Those who didn't leave stayed in Okinawa and were enslaved by the Japanese.