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Ropalidia fasciata
small wasp, size around 1 cm, it is guarding their hive.
They make a hive under the leaf of tree in the pot, Chiang Mai University, Thailand
Thanks, LandmarkExpert, The little hive of these wasps still exist ^^..now their population is 3 wasps.
Here's another link for your lovely paper wasp:
http://insectahk.com/hymenoptera/ropalid...
Regards!!