Ka la 21 Phuptjane, 2021, letoto la YE4 (katleho ea matla IE4) ea mekhahlelo e meraro ea li-asynchronous motors tse ntlafalitsoeng ke Hebei Electric Motor Co., Ltd li ile tsa fuoa "China Certificate for Energy Conservation Product" ho tsoa China Quality Certification Center.Sena ha se feela tlatsetso ea rona ntlafatsong ea naha ea matla a motlakase, empa hape ke mohato oa pele oa ho khothaletsa mosebetsi oa "Emission Peak le Carbon Neutrality".

Li-motor tsa rona tsa YE4 tsa mekhahlelo e meraro ke li-motor tse loketseng ho khanna li-fan, lipompo, li-compressor, hoist, centrifuges le lisebelisoa tse ling liindastering tse kang lik'hemik'hale, samente, ho etsa pampiri, tšepe, oli le khase ea tlhaho joalo-joalo.