Compiling Weihen's information with that provided by Surblue, Jacker4s, 331449773, and 火柴in天堂 on Baidu, the transport for this leg:
From Los Angeles to Guangzhou
CX 883 from Los Angeles to Hong Kong, 2220-0600
KA 782 from Hong Kong to Guangzhou, 0800-0855 (actual arrival 0857)
Natalie/Nadiya, Leo/Jamal, Dave/Connor, Jet/Cord
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BR 15 from Los Angeles to Taipei, 2245-0530
BR 707 from Taipei to Guangzhou, 0810-1015 (actual arrival 1019)
Joey/Meghan, Luke/Margie, Brendon/Rachel, Mark/Mallory, Herbert/Nathaniel, Jessica/John, Jennifer/Caroline
From Baiyun Intl Airport to Jiangnan N Ave
Taxi: Natalie/Nadiya, Leo/Jamal, Dave/Connor
Metro: Jet/Cord (overtaking Natalie/Nadiya, Leo/Jamal, Dave/Connor)
Taxi: Jessica/John, Jennifer/Caroline, Joey/Meghan
Metro: Brendon/Rachel, Mark/Mallory, Herbert/Nathaniel, Luke/Margie (overtaking Jessica/John, Jennifer/Caroline, Joey/Meghan)
Misdirected (with honest intentions) from Jiangnan N Ave to Changgang
Taxi: Natalie/Nadiya, Leo/Jamal (fall behind Brendon/Rachel, Mark/Mallory, Herbert/Nathaniel, Luke/Margie)
From Jiangnan N Ave to Canton Tower
?: Jet/Cord
Metro: Dave/Connor, Brendon/Rachel, Herbert/Nathaniel, Mark/Mallory, Margie/Luke
?: Jessica/John, Joey/Meghan, Natalie/Nadiya, Jennifer/Caroline, Leo/Jamal
From Canton Tower to Haixinsha (updated, thanks Weihen!)
Taxi: Jet/Cord, Brendon/Rachel, Leo/Jamal
Metro: Dave/Connor, Luke/Margie (overtaking Leo/Jamal)
Taxi: Mark/Mallory, Herbert/Nathaniel, Jessica/John, Jennifer/Caroline
Metro: Joey/Meghan
Taxi: Natalie/Nadiya
From Haixinsha to Huacheng Square
Walk/taxi?