How much is the miminum investment for a Permanent Residency Visa?

The following quote is from a recent article in the Taipei Times … 2003072856

Does anyone have an idea how much ‘a certain amount’ is? What is the minimum investment to qualify?
Thank you

A few days ago I heard on ICRT Radio that the required investment sum will increase in the future.

I could not find any news on when and how much.