To say OPPO may be planning to expand its K series of smartphones may be somewhat of an understatement. The OEM has reportedly made a total of 21 trademarking applications for new device names along these lines. This volume of applications may mean that it plans to keep this line going for some time.
https://www.notebookcheck.net/OPPO-trademarks-a-whole-bunch-of-new-names-for-K-series-smartphone.427722.0.html