original: Koxinga proceeded to devote himself to building Taiwan into an effective base for anti-Qing Dynasty sympathizers who wanted to restore the Ming Dynasty to power.
simplifications: Koxinga focused  on turning Taiwan into a base for anti-Qing Dynasty supporters who wanted to give back the power to the Ming Dynasty. Koxinga was devoted to building Taiwan into a base for anti-Qing Dynasty sympathizers who wanted Ming Dynasty back in power. Koxinga worked to restore Taiwan to a home for anti-Qing Dynasty supporters. They wished to return the Ming Dynasty to power. Koxinga became committed to turning Taiwan into a base for anti-Qing Dynasty supporters who wanted to bring the Ming Dynasty back to power. Koxinga devoted himself to making Taiwan an effective base for anti-Qing Dynasty sympathizers who wanted to restore the Ming Dynasty to power. Koxinga devoted himself to building Taiwan as a base for anti-Qing Dynasty sympathizers. These sympathizers wanted to restore the Ming Dynasty's power. Koxinga then focused on building Taiwan into a base for anti-Qing Dynasty supporters that wanted the Ming Dynasty back. Koxinga was to building Taiwan into an base for those sympathizing with anti-Qing Dynasty. They wanted to bring Ming Dynasty to power. Koxinga started working on  building Taiwan into an effective base for anti-Qing Dynasty sympathizers. Anti-Qing Dynasty sympathizers wanted to bring back the Ming Dynasty to power. Koxinga continued to dedicate himself to building Taiwan as an useful base for anti-Qing dynasty sympathizers who wanted to restore the Ming dynasty to power.