What kind of mobile phone does the green factory refer to?

Green factory refers to OPPO mobile phone. OPPO mobile phone is a well-known smart phone brand in China, which belongs to Guangdong Opal Mobile Communication Co., Ltd. The nickname of "Green Factory" comes from the iconic green background Logo of OPPO mobile phone, so it is affectionately called "Green Factory" by netizens. OPPO was established in 2004, and its headquarters is located in Dongguan, Guangdong Province. Since its establishment, OPPO has developed rapidly and won wide market and consumers' love with its innovative technology and fashionable design. OPPO mobile phones are famous for their functions such as taking photos and flash charging, and their products cover entry-level to high-end smart phones to meet the needs of different consumers. OPPO's flagship series includes Find and Reno, which represent the most advanced technology and the highest technological level of OPPO.