

Does it qualify for the 72 hours visa free transit?
This is my itinerary: SCL-CDG-PVG(24h stop)-URC(24h stop)-IKA.
Some Southern China flights even stop both in URC and XIY on their way to IKA.
Neither Urumqi nor Xian are in your list of airports, but is it just an omission? Also, after 1 month in IKA I go back to PVG for studies, so I am coming out of SCL already with a student X1. I don't want the police to stamp it in my first transit stop at PVG, and use instead the free transit, or else my X1 will expire before I return to China and even get a chance to register at my university.
Is there the risk the airport police rushes to stamp my student X while I'm still just in transit? Would they be angry or react badly if I covered the X1 with post-it notes to avoid having it stamped ahead of time? Could your company offer a service to me to somehow notify my situation and make sure I have no problem with the Chinese police?
Thanks!