Isu tiri mutungamiri anotungamira mugadziri weOem / odm uye tsika imwe-yekumira mhinduroMune indasitiri yekuriritira yemuromo, ine makore anopfuura manomwe ezviitiko zvezviitiko zvepamusoro.Nezvipfuyo zvinopfuura makumi mashanu, yeRhamwari yedu inogara ichitsvaga mitsva mitsva yekuchengetedza zvakachengeteka uye zvinobudirira zviripo zvigadzirwa, kuvandudza ruzivo rwemushandisi uye hupenyu hwehupenyu hwevatengi vepasirese.Zvigadzirwa zveIvimale zvinotumirwa kumisika mikuru mhiri kweNorth America, Europe, Australia, uye Asia. Isu tine kuvaka kupatsanurana kwenguva refu nevatungamiri vanotungamira vakadai saWalmart uye chinangwa, pamwe nemhando dzenzvimbo dzinozivikanwa, vatengesi, makiriniki, uye vaforamu. Kutungamirirwa neuzivi hwedu hwenyanzvi, "ivismile, ivhirii"
Semumwe wevatakuri vepamusoro-svutugadzike venyhushi muChina, ivistile inonyanya kuitwa mumapoka maviri: muromo kuchenesa nemazino kuchena.