Another suggestion based on XiamenAir this time multi-city flights from Dublin to China & Philippines available already for €389 roundtrip! (European part is covered by their SkyTeam partner KLM). You would have to accept longer layover in Xiamen on your outbound flight on the other hand this solution is by far the cheapest option from Ireland we have ever spotted also you would have enough time to refresh before your next flight. At this moment the cheapest option is on route Dublin to Manila with return from Cebu to Xiamen.
XIamen Airlines promotional deal is valid for flights departing to Asia from January till end of March 2017. Based on date of your outbound flight to Manila. Max stay 1 month. If interested in this XiamenAir / KLM deal you can refer to below booking and travel date samples.
Booking samples
Dublin - Philippines - China - Dublin from €397 (booking sample via Expedia)
Travel date samples
4.1. - 19.1. - 21.1.
7.1. - 25.1. - 28.1.
18.2. - 8.3. - 11.3.
22.2. - 8.3. - 18.3.
1.3. - 22.3. - 25.3.
Booking sample of cheap multi-city flights from Dublin to China & Philippines €389 here. In this case you would depart from Ireland to South East Asia (Manila) on 18th of February 2017. You would then return from Philippines to Xiamen on 8th of March. Finally you would fly from China back to Europe on 11th of March 2017.