The R & D base covers Beijing, Shanghai, Nanjing, Shenzhen and Guangzhou, with sales network all over the country.
ພື້ນຖານ R & D ກວມເອົາປັກກິ່ງ, ຊຽງໄຮ, Nanjing, Shenzhen ແລະກວາງໂຈ, ມີເຄືອຂ່າຍຂາຍທົ່ວປະເທດ.