Counties: Spence, also known as Shining in the Jinding not on the night, often under rocks lives float on the green light from 1:00, 2:00 formed 10 million, like stars in the jumping, in the dark valley erratic, the ancient people who were praised as "10,000 light North Korea Pu." Spence is extremely unusual, its causes are three versions: one is the USS Valley, added to the light of fireflies, another version is that some trees there is a dense ring of when humidity in the air will reach 100% luminous, but Spence is still a puzzle.