济南公司总部：
办公地址：
济南市历下区舜华路1117号，科汇大厦北区4层
生产基地：济南市长清区万德街道办事处万德工业南园7号
联系电话：0531-88166170
移动电话：13475999537 18660797215
QQ：1242935579 75441605
Email：seamansign@126.com
Corporate headquarters in Ji'nan:
Office's address: Ji'nan Lixia District Shun Hua Road, No.1117
4 floors of north section of Kehui Mansion
Production base: Ji'nan Changqing District Wande Street,
No. 7 industrial South Garden
Tel: 0531-88166170
Mobile：13475999537 18660797215
QQ:13520318539 1242935579 75441605
Email:seamansign@126.com