

One day extention because of the tickets schedule
Hi, I am Bolivian (South America) but I study and live in Brazil, I have a 15 days F, I am going to Guilin to an academic event. My flight is From São Paulo-Brazil to Guilin (connection in Beijing) round trip, I purchased a 15 days round trip. When I purchased the ticket I just think in my final destination (Guilin) in this case I think there were not problems, but I'am afraid to have to do imigration in Beijing . I am arriving in Beijing on July 16 early in the morning (immediately I will depart to Guilin), and my return is programmed for July 31st from Guilin, so I will be in Beijing on July 31st after midday, and the flight from Beijing to São Paulo depart on 00:20 of august, 1st, (but the policy of my flight does not permit me to left the airport so I will stay there just waiting for my fligth) I am afraid to be stopped or punished because of the time (some hours, because my entry in Beijing will be early in the morning).
Thus, I would like to know if I will need to ask for a visa extension (just for some hours or a day) where I should go to ask for it (in Guilin), and if it is an ease procedure.
Thank you in advance for your time.