https://www.theverge.com/circuitbreaker/2017/11/4/16602718/oneplus-5t-probably-look-like-the-oppo-r11s

Most people don’t know this, but OnePlus is owned by BBK Electronics, a major Chinese technology manufacturer that also owns smartphone maker Oppo. So it should come as no surprise that certain OnePlus and Oppo phones may share a similar (see: identical) design language.

Earlier this year when the OnePlus 5 was released, people noticed that it was completely identical to the Oppo R11’s design, although the latter was 0.5mm thinner. While the specs may have varied, it doesn’t seem like OnePlus did much in the way of product design, and it looks like that trend will continue.