I am going to Shanghaï in a few months for 2 days and after that onward to Tokyo on a JL award.

Since I am staying only two days in Shanghaï, I plan to use the free transit visa (TWOV) but I was wondering if UL is aware of all the rules about TWOV and won't cause me any problems (I know some airlines employees are not really familiar with TWOV and can cause a lot of troubles to passengers denying boarding for no reasons).

Any of you have experiences using TWOV with UL?

Thank's for your feedback!