Who to Contact
- Export saleshongxinmetal@sina.com · +86 180 0266 5386 (WhatsApp and WeChat on the same number)
- Technical supportGrade selection, thermal expansion, conductivity and tolerance questions. Same mailbox — mark the subject with “Technical”.
- Documents & accountsProforma invoice, packing list, mill certificates, RoHS / REACH declarations and shipping documents.
- Working hoursMonday to Saturday, 8:30 – 18:00 China time (GMT+8). Inquiries received overnight are answered the next morning.
- LanguagesEnglish, Spanish, German and Chinese.
- Factory visitsBuyers and engineers are welcome at the plant in Chang'an, Dongguan — see the Visit tab for how to get here.