[Tainan]

This get re-affirmed about every 5 years or so. First in story-telling. Then in water-craft capability. Then in DNA/Genetic comparison and now of late by way of linguistics characteristics and similarities.
To add to the mix, there has been consistent excavation of civilizations with developed metallurgy pre-dating metallurgy on the mainland(China) found here on Taiwan. Its not a real popular subject among the academics. They basically follow anything that favors a mainland first 5,000 yrs of 'Chinese Culture' mantra.

(Its 5,000 years alright...too bad its the same year repeated 5,000 times)

[Citizen Tom Paine]

Has anyone with a sailing background looked at the prevailing winds and currents in that area of the world. I would suggest that the followed the currents and run before the wind. Could they beat into the wind with their crafts?

5000 years ago the sea levels should be lower since the glaciers would still be melting. ( I am not sure of this.)