WI: Exiled Ming Dynasty to New World in 17th century

Say, some Southern Ming loyalists after escaping to Taiwan, after considering the situation, build tons of ships to go to the New World in 1670.

The Chinese already known about the New World, with Spain’s yearly galleons coming from Acapulco to the Philippines.

Say they establish a colony in OTL Seattle/San Fransisco, and the Qing doesn’t care after annexing Taiwan (the exiled Ming Dynasty will probably relinquish it’s claims in China after a few generations forging a new identity and culture or if threatened by the Qing.)

Obviously the Spanish could annex them easily, but let’s say there is a huge amount of immigration coming from East Asia, and the colony reaches 3 million by 1770, with enough population to make conquest a hassle.

What are the effects? I assume this China on the West Coast will be modernised after being exposed to Western ideas.
 
Obviously the Spanish could annex them easily, but let’s say there is a huge amount of immigration coming from East Asia, and the colony reaches 3 million by 1770, with enough population to make conquest a hassle.

Spain most certainly couldn't annex it easily, at least if there's a court fit for a Ming prince there. There will be thousands of people there very early on. Logistically almost impossible for Spain.

3 million seems like quite a bit. Especially if the Qing just go with the Sea Ban like OTL--no reason they wouldn't, and it might be longer lasting too. Most Chinese who evade the ban would still go to Southeast Asia anyway.
 
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