Izitulo ezinamavili ezigoqekayo zombane zifumene udumo phakathi kwabathengi ngenxa yobunzima bazo obulula kunye nokulula kokugoqa nokuthwala.
Ilula (yi-25kg kuphela), kulula ukuyisonga, ubungakanani obuqhelekileyo bokusonga, kwaye kulula ukuyigcina nokuyithutha. Injini engenabhrashi, ibhetri ye-lithium, kunye nefreyimu ye-aluminium alloy ye-titanium ye-aircraft yesihlalo esinamavili sombane saseNingbo Baichen zenza ukuba ibe lula nge-2/3 kunezinye izitulo ezinamavili zombane. 2. Ingathwalwa njengempahla yokuhamba, nto leyo eyandisa kakhulu ububanzi bomsebenzi kubantu abadala abanengxaki yokuhamba phesheya.
Ngenxa yokuba abantu abadala nabakhubazekileyo basebenzisa izitulo ezinamavili zombane kwimisebenzi eyahlukeneyo yemihla ngemihla, iimfuno zomthamo webhetri ziyahluka. Kwaye, ngokuxhomekeke kwiimfuno zabasebenzisi, isitulo esinamavili sombane saseNingbo Baichen sinokuxhotyiswa ngebhetri enye okanye ezimbini.