Both male and female Slender Skimmer (Orthetrum sabina) have yellowish green thorax with black stripes.
Sections 1-3 of the abdomen are swollen like a ball.
They are widely distributed: from the Mediterranean through southern and eastern Asia to Australia.

1st & 2nd photo: My Son Sanctuary, Hoi An area, Vietnam, 29 December 2023
3rd, 4th & 5th photo: Cu Chi Tunnel Site Ben Duoc, Ho Chi Minh City, Vietnam, 21 December 2023