What the Hell is this thing in my passport?

I applied for a 60 day tourist visa in Hong Kong. I picked up my passport a few minutes ago to find a slip of paper entitled Visa Application Form For Entry Into Taiwan.

It has a barcode, my picture, and an expiry date (60 days hence). It also bears a stamp instructing me to present it to a visa officer at the airport in Taiwan.

Am I going to have to pay again? Is it just a straight swap? Are they going to actually let me in, or is there still a possibility I’ll be declined entry? What the Hell?

when you get back… go to the visa window before immigration. They’ll turn it into your visa for entry. I thought exactly the same when I did it recently