Xiamen bullet train to Quanzhou or Fuqing

That' right. The bullet train heading for Quanzhou and Fuqing will depart from the North Railway Station. Actually, although it will be crowed at that time, you can still get a ticket in the railway station upon your arrival, because the trains for the journeys are scheduled frequently.
In case of missing getting tickets, you can also book online in the website:
https://www.travelchinaguide.com/china-trains/