Thank you for the information.
Unfortunately 2 step verification would not work for
me as I am not traveling with a mobile, i-pod, etc.
I will soon leave Taiwan and try to log on in a country
where I previously had no difficulties.
Looking through an extensive list of user problems over
the past year, I have not found anyone who has had
an experience similar to mine. I wonder if this has to do
with Taiwan or Chinese issues. This will probably remain
an unsolved mystery.
.