Place the holder of the ninth abdominal segment at the end of the body,
Firmly squeeze the female dragonfly' s neck holder,
The holder is a pair of structures like a key and a lock,
The female dragonfly put her tail end,
Reach under the second abdominal segment in the middle of the male dragonfly' s stomach,
Two dragonflies form a heart-like pattern,
After a stick of incense,
This unique heart-shaped position continues...