Works as one-way for half the price.
FOC-JFK r/t for $409 -
https://goo.gl/flights/mMFf
FOC-JFK o/w for $209 -
https://goo.gl/flights/JJvO
Xiamen Airlines (MF) Z6MPRUSC/ZOWPRUSC
VALID FOR TRAVEL COMMENCING FROM THE JOURNEY ORIGIN ON/ AFTER 15FEB 17 AND ON/BEFORE 30JUN 17.
TICKETS MUST BE ISSUED ON/AFTER 25DEC 16 AND ON/BEFORE 31DEC 16.
Also available from other destinations in Asia:
PEK-JFK r/t for $863 -
https://goo.gl/flights/usyf
BKK-JFK r/t for as low as $571 -
https://goo.gl/flights/NCNr
TPE-JFK r/t for $742 -
https://goo.gl/flights/HbWf
MFM-JFK r/t for $839 -
https://goo.gl/flights/RK8J
etc..
Not all dates are available from what I can see. Best is to use ITA to search the cheapest dates then book through an OTA.
Edit: Books in Z, which doesn't seem to earn any miles. Still a great price for this route.