I don't think so. It's a relatively small amount of money down for such a large potential. China's growth is slowing considerably from over 9% to just over 7. It's real estate market is correcting but they are still seeking to grow their economy (i.e. PRINT). And don't forget, Nb is one of the metals put on the hot list by many governments around the world.
As excited as those buggers seemed to be about the 3rd largest property on the planet, this is as good as a done deal. IMHO