Which country's brand is OPPO?

OPPO is a domestic mobile phone brand. China is a large-scale high-tech enterprise registered in the world, integrating R&D, manufacturing and marketing, and its products are exported to Hongkong, the United States, Russia, Europe, Southeast Asia and other markets. Successfully launched MP3, MP4, Blu-ray DVD, mobile phone and other products, and is now committed to the research and development of smart phones and Blu-ray DVD. OPPO currently has four series of mobile phone products: F series, N series, R series and A series.