20° 13' S 70° 09' W

Make your way to Chen Clan Academy. Stand still in front of the master to receive your next clue. You better have a clean forehead for this leg of the race.
  ask a Friendly Local how far the place is. The FL holds up five fingers, meaning, of course, 50 minutes on foot. The Cowboys decide he means, of course, 15 minutes on foot. They drop to last place.
23° 08' N 113° 15' E

[Forehead stamp] Additional information: Watch out! There will be many children present. Try not to run into them.
23° 11' N 113° 16' E

Who's the mechanic?

Build a motorized kiddie car from the boxed parts provided, complete with instructions in Chinese.
  Jennifer says Caroline is good at assembling things, so Caroline takes it. Then she turns around and says she hates assembling things and gets ticked off. Jennifer works hard to convince Jet & Cord to give the second Express Pass to them.
   
   
  Meghan helps John after she's done.
Travel by taxi to the Guangzhou Children's Cultural Center with your kiddie car.
  Mark asks Mallory to carry his backpack while he carries the car. She does so, then sets it down on the ground near their cab, expecting him to put it in the trunk along with the car. Mark doesn't realize she's giving up custody of his pack, and they drive off without it.
23° 09' N 113° 16' E
  discover the missing bag on the way here. They argue over whether to get Mark's bag, whether to do that first or finish the Detour first, and every other aspect of the problem.
FEATHERBALL
Join two experts to make a team of four and make ten hacky-sack-like passes of a featherball between you. (That's you, not the experts.)

    
    
CHINA CUP
Receive an ancient Chinese treatment: having your backs cupped. Glass cups will be heated to a near vacuum and applied to your skin.

* crickets *
Make your way to the next Pit Stop....
23° 07' N 113° 14' E
  1st place 6:22 pm
$2500 each
6th place 6:28 pm (+ 0:06)
2nd place 6:23 pm (+ 0:01) 7th place 6:36 pm (+ 0:14)
3rd place 6:24 pm (+ 0:02) 8th place 6:49 pm (+ 0:27)
4th place 6:26 pm (+ 0:04) 9th place 6:50 pm (+ 0:28)
5th place 6:27 pm (+ 0:05)
  10th place
Eliminated
  The first seven teams all arrived so close to each other that Phil hadn't finished checking the previous teams in by the time the next team showed up. Phil lost count of the teams at one point.