1. Guangdong OPPEIN Home Furnishing Group Co., Ltd., in Guangdong
2. Jiangshan OPPEIN Door Industry Co., Ltd., in Jiangshan, Zhejiang
3. OPPEIN Pai Electric Vehicle (Tianjin) Co., Ltd., in Tianjin, Jiangsu
4. Oppein flooring, Suzhou Suou Wood Industry Co., Ltd., in Suzhou
5. Oppein ceiling, Oppein Kitchen Appliances (Zhejiang) Co., Ltd., in Jiaxing, Zhejiang
There should be other companies, but only the first four companies have actually registered the right to use the trademark