The A9 was added to OPPO's store without an official announcement, and the store page does not even reveal the full specs. OPPO most likely used the MediaTek Helio P70 SoC to power the A9 and added 6 GB of RAM plus 128 GB of storage. Also included are a large 6.53-inch FHD+ IPS screen and a 4,020 mAh battery, together with a 16 MP selfie cam and a 16 MP + 2 MP dual-cam on the back.
https://www.notebookcheck.net/OPPO-sneaks-in-the-A9-mid-range-handheld.419269.0.html