Juggling Elves

Along the road from Weichang to Chengde (here), there were a lot dragonflies playing handstand in the bush. They were small in size, but charming.

Update：
The First Species：Sympetrum pedemontanum Allioni, 1776
The Second Species：Sympetrum depressiusculum ( Selys,1841 )
Family: Libellulidae (the largest dragonfly family)

Reference：http://www.insect-fans.com/bbs/viewthread.php?tid=30368&extra=page%3D1
http://www.insect-fans.com/bbs/viewthread.php?tid=13509&extra=page%3D1