This is to understand the idea of feudal systems in China.

This example is not necessarily accurate so much as an illustration that conveys the idea of a feudal system. The cities would be governed locally, but, answered regionally to higher authorities and ultimately to the king/emperor.

Yes, Taiwan is in this picture, but, it was not part of the Zhou Dynasty. This comes much later. Kindly keep in mind that Europe when it had a sailing fleet discovered the "West Indies" by going around the "Horn of Africa." I think it was Magellan much later than the Zhou Empire that would be the first to circumnavigate the world.