William Shakespeare - "Something is rotten in the state of Denmark" should really be rewritten for Guilin. World Race Productions pulled some shady deals in this episode.
First is the 22 hour pit stop.
Second is not showing some kind of hours of operation. The first 4 teams would all have arrived in Guilin airport by midnight, with the delay on CZ3303 not putting Jaime/Cara and Victor/Tammy and Margie/Luke in much after Kisha/Jen on Shenzhen 9637. OK, so they have at least until after sunrise at 656am to do something. Since nothing is shown, they has to have been an unshown hours of operation halt. If not, then all teams would have arrived at the first clue box at the beauty salon at its opening and they clearly did not.
Third, the editors pulled their ususal stunts in attempting to make it look competitive for Mark/Michael. After being stradned overnight in Guanzhou airport they would not have left Guilin airport before 11am. I look to Chateau to provide some confirmation if possible, but I see no way(except really strange hours of operation) that Jaime/Cara would not have completed their ROADBLOCK and DETOURS before that.