vivo and oppo are two mobile phone brands. According to the information on the official website of BBK Group, we learned that since both OPPO and VIVO have a relationship with BBK Group, the products and marketing models of the two brands are also very similar, and they are often discussed together. In addition, OPPO's trademark is slightly green, and Vivio's trademark is blue. , so the two brands are collectively called Blue and Green Factory by netizens.