总部：马来西亚-槟城

Address:  No.2288, Mukim 14, Permatang Tinggi,14000 Bukit Mertajam, Penang, Malaysia
Phone:  +604 568 2925 (Hunting Line)
Phone:  +604 568 2932
Email:  marketing@otlgp.com

马来西亚-黑木山

Address:  Lot 203, Kawasan Perindustrian Bukit Kayu Hitam, Mukim Laka Termin, Kubang Pasu, 06050 Kedah Darul Aman, Malaysia
Phone:  +604 922 2505 / + 604 922 2507 / + 604 922 2508
Phone:  +604 922 1725

泰国

Address:  294/33 Leabmotorway-Romklao Road, Klongsamprawet, Ladkrabang, Bangkok 10520, Thailand.
Phone:  +66 2737 9801/2
Phone:  +66 2737 9803
Email:  siwaploy@otlgp.com

越南

Address:  14th Floor, Handico Tower, Me Tri Ha New Urban City, Pham Hung Road, Nam Tu Liem District, 129400 Hanoi.
Phone:  +84 2473052525
Email:  vn-admin1@otlgp.com