| Jiaxing Factory：Jiaxing Donnyi Oil Co., Ltd. | |
| Address: No. 168, Xingsheng Road, Yuxin Town, Nanhu District, Jiaxing, Zhejiang | |
| Tel:：0573-82853330 / 0573-82697770 | |
| Zibo factory：Dongli Oil Products (Zibo) Co., Ltd | |
| Address: West of the intersection of Fenghuangshan Road and 309, Zibo City, Shandong Province | |
| Office：Shanghai Baijing Trading Co., Ltd | |
| Address: Room 454, No. 175 Zhongshe Road, Songjiang District, Shanghai, China | |
| Tel：021-37824350 | |
| Email: cheneyliao@foxmail.com |
