HI,
You can check in www.elong.com , www.yoee.com , or www.ctrip.com , and by the ticket in internet by card o deposit back account that get the eticket.
Now elong have 往返价晋江 only $840 + tax , 往返价厦门 $800 +tax , you can check by yourself.
PS. I always buy tickets at elong and yoee,hope can help you.