China-US have a set amount of Tier I frequencies (any US City to PEK/PVG/CAN)
Hainan had SEA-PEK/PVG, ORD-PEK, SJC-PEK, BOS-PEK/PVG and LAS-PEK - not all daily but I'm sure BOS/SEA combine for almost 3 daily frequencies.
There could be some major route shuffling. For all we know it could...