O biputere, nke a kpọrọ dịka akụkụ obe dị ka U si dị, bụ ụdị piket kpakpando HEBEI JINSH nke nwere ọtụtụ ihe eji eme ihe nke a na-ejikarị eme ihe n'ahịa mba Amerịka. Oghere ndị a kụrụ naanị ha na-eme ka waya ogige ahụ sie ike. Ya mere, enwere ike iji ya chekwaa ogige waya, dozie osisi, ọbụna iji chekwaa akara okporo ụzọ, wdg.
Enwere ike kewaa ogidi U abụọ: site na spade maọbụ site na-enweghị spade. Ogidi ahụ ejiri aka sie ike na ogidi ahụ na-enyere aka ime ka ogige kwụsie ike site n'ịbawanye mpaghara kọntaktị n'ala. Ogidi ahụ na-enweghị spade nwere ike ịdị mfe ịkụnye n'ala karịa nke ejiri spade.