medical devices( medical masks、 protective clothing) Production、 Management。 Production、 Processing、 Sale: Ordinary masks, earphone, ear wire, data cable, charger, speakers, microphone, Electronic accessories, mouse, keyboard, Battery, mobile power bank, computer accessories, Mobile phone accessories。 Import and export of goods or technology( Except for the import and export of goods and technologies that are prohibited by the state or involve administrative approval)。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments)