Originally Posted by HkCaGu

Welcome to Flyertalk. Looks like you have a lot to learn. A lot!

It is just beyond many Flyertalkers' imagination here that you'd book a 1930 departure on a separate round trip ticket to a 1950 arrival. Not only you forgot about the time change in comparing arrival times and ignoring schedule changes, it's a basic knowledge for transpacific flyers that westbound flights take longer as we go into winter due to increasing headwinds. Even if you begin comparing today, first day of standard time, a SFO-TPE flight will most likely take longer in late December than now.

Also, another basic knowledge a traveler should have is that a round-trip ticket cannot be used out of sequence. Once you no-show for a segment, the rest of the ticket's reservations are canceled, and the ticket may well become worthless.

If any of your tickets are booked in the US or elsewhere with a 24-hour cancel/refund window, you may want to exercise that.