China Southern in the last few weeks gradually updated its planned summer 2017 operation for selected long-haul routes. As of 11DEC16, the planned service increase is as follows.
Guangzhou – Nairobi Service increase from 3 to 4 weekly from 04JUL17 to 27AUG17, A330-200 service
Guangzhou – New York JFK Planned increase from 10 to 14 weekly for peak season in 2017 to commence from 22JUN17 to 27OCT17, 777-300ER service
Guangzhou – Toronto Service increase from 3 to 5 weekly from 24JUN17 to 28OCT17, 777-300ER service
Guangzhou – Vancouver Operational aircraft switched back from 777-300ER to 787-8 from 26MAR17
Additional changes, including other long-haul routes, will occur in the next few weeks.