Kwa zaka zambiri, kampaniyo imatsatira mfundo ya khalidwe loyamba, China chitsanzo cha zida zopenta ndi kampani yoteteza zachilengedwe, chilengedwe choyambirira, kasamalidwe ka kalasi yoyamba, khalidwe lapamwamba.Adayika ndalama zambiri zofufuzira, adalandira ziphaso zingapo zapatent mdziko.
Nthawi yotumiza: Jun-23-2022