Originally Posted by
State of Trance
Thanks so much for this. I didn't realize that Shanghai Immigration had their own Q&A form, and it's nice that they also archive previous answers. From this reply, it seems like the exception only holds for onwards transit to the U.S., although immigration may have also misread and classified them as mainland residents.
处理号：19025 留言时间：2019.1.15 姓名：李**
问： 您好，我父母是中国公民（持有中国护照）持有美国绿卡，长期在美国生活并且已经被注销了国内的户籍。春节期 间想从美国回上海探亲，之后去从上海去台湾旅行，我父母有在美国申请的入台证，但没有大陆居民往来台湾通行 证。请问我父母能正常从上海出境去台湾吗？谢谢。
回复时间：2019.1.16
答： 您好！大陆居民前往台湾，须办理好大陆居民往来台湾通行证和签注。根据您描述的情况，您父母仍持中国护照， 属于大陆居民，故须办理好大陆居民往来台湾通行证和签注方可前往台湾。若有疑问，您可致电上海边检总站（0 21—31366000，51105100）咨询。
No this is the whole point of the rule. If you're transiting Taiwan to return to the US then you're fine with just a Chinese passport. However, if you're simply visiting Taiwan and then returning to China (or a third country other than the US) then you must hold the appropriate document.
Originally Posted by
State of Trance
I seem to remember last time, she was questioned both exiting PVG and entering HKG as to why she didn't have a Two Way Permit. Of course, I can clarify any plans with immigration directly online now, so thanks again for finding that!
How long ago was this? Previously Chinese border security did have a role in checking onward visas and such but that practice stopped around two years ago.