The renders aren't very detailed, but there are a few things to consider here. For instance, the triple-camera module on the back looks just like the OnePlus 8T's while the front retains the off-centered punch-hole design for the selfie camera.
The upcoming OnePlus 9-series are said to launch earlier next year in March and the first batch of rumors started flying in this month. At first, wе heard that OnePlus is planning to launch three OnePlus 9 phones but then the rumor was quickly dismissed. Now we have CAD-based renders of what seems to be the vanilla OnePlus 9.