Han Wuji
mmmm.. this is my thought HS - is the real HS from outside world.. Lu Jin - is the GU xiangwen He ze Chu - will help HS and GN to travel back to the other side. no one knows the true face of the HS in this world, and remember theres a big explosion in in Russia where HS tried to tracked down GN and the abductors mark. and he almost fell on that explosion in Siberia.. maybe just maybe song Jinning had a breakthrough on the magnetic field.