Well I was just reading Shadows of Asia p. 39. Beijing Mandate of Heaven. Looks like we have the first instance of Lightning Children in Shadowrun.
OK Lightning Children is basically a race native to Cathay in Earthdawn(they are in the new Cathay book from Red Brick) that are born in the aftermath of a lightning strike on the ground. They are born in a adult human form with no recollection on who he was. They have lightning spirit powers.
So looks like Li Tianzi first emperor of Beijing is a Lightning Child.