| Hotline | ： | 400 090 2289 |
| ： | services@obtlighting.cn | |
| CHN | ： | Floor 2, No. 979, Yunhan Road, Lingang New District, China (Shanghai) pilot Free Trade Zone |
| HK | ： | Office 5, 8/F, Mega Cube, 8 Wang Kwong Road, Kowloon Bay, Kowloon, Hong Kong |
| UK | ： | Unit G1 Capital House 61 Amhurst Road, London, United Kingdom, E8 1LL |