Song Zi Kampani ya Elevator Equipment ndi Song Zi zida zonyamulira, Song Zi makina okweza, Song Zi opangira zida zonyamula zinthu zambiri. Zogulitsa zazikulu ndi: Song Zi zida zonyamula, Song Zi makina okweza, Song Zi zida zokwezera landirani makasitomala atsopano Akale abwera kudzagula.