Shanghai Sanhong Industrial Co.,Ltd.After years of developing, we have already set up our production plants separately in the North of China and the South of China to meet the rapid developing demands; at the same time, we established our research and sales centre in Guangzhou to supply various kinds of security seal products to the industry fields of railway, road, port, voyage, petroleum, chemical, electricity, post etc. .The products we offer meet the ISO PAS 17712 international standard and enjoy high reputation in domestic and overseas markets with reasonable price and reliable quality. The worthy service we offer brings you reassurance and VALUE.