He pikitanga matamua Gansu , he pikitanga hidrauliki, Gansu he pikitanga hidrauliki, Gansu he pikitanga hidrauliki, he pikitanga tapatahi, he pai, he nui rawa te utu He kaha rawa te mahi, he teknolojia whakaneke noa atu. Hohoro mai Gansu he hunga hou, he hunga tawhito e haere mai ana ki te whakatakoto whakaaro, ki te rapu