In the west of Panlong city, in the hills above the city, there is a place called the "Thunder Core" , which is covered by a thick cloud of thunder. If you can hang there for an hour, your blood will be reborn. But if you don't, you'll never be able to get your blood back. Worried that he's going to lose his chance to get back his father's blood, jiang tells him to go to the core of the thunder and wait for it to come back.