Apple was founded by Jobs, stephen wozniak and Ron Wayne in April 1976, and its headquarters is in Petinos, California, USA, which is the heart of Silicon Valley. Huawei Technologies Co., Ltd. was established in 1987, and its headquarters is located in Longgang District, Shenzhen City, Guangdong Province, China. Huawei is the world's leading provider of information and communication technology (ICT) solutions, focusing on the ICT field, insisting on steady operation, continuous innovation and open cooperation, and is committed to realizing the future information society and building a better fully connected world; OPPO, the full name of OPPO Guangdong Mobile Communication Co., Ltd., was founded by Mr. Chen Mingyong and others in 2004. Is the world's leading intelligent terminal manufacturer and mobile Internet service provider, with business in more than 50 countries and regions. Enjoy the beauty of science and technology with global users through more than 400,000 sales outlets and 2,500 service centers. As a well-known enterprise in the global mobile industry, Samsung has been committed to developing new differentiated products and satisfying different user experiences through purposeful innovation. We have more than 10 years of experience in Galaxy R&D, and have realized innovative technologies such as foldable smart phone, Galaxy 5G, Internet of Things, Samsung Knox, Samsung Zhifu, Samsung Health and Bixby.