I'll put my speculation for the first leg (if they're staying in Guangzhou) here:
- Based on the pattern of 1st episode, which showcasing adrenaline themed task, the location I can only think is Canton Tower, which is the tallest structure in China. Maybe either rappelling up/down, or taking a bungee jump on the tower.
- The next task I speculate is relating with Cantonese opera (in any way that sometimes we can't think of).
- There might be an active Route Marker task.
- Finally, I speculate the Pit Stop location is the Temple of the Six Banyan Trees.
This is my PURE speculation, so this can be incorrect.