OPPO is said to have a first-gen tablet in the works, and intends for it to become part of a cross-device ecosystem that may also incorporate devices such as laptops as well as phones in the future. Now, a new product from the OEM that has appeared on the 3C regulatory database might reveal this "Pad's" charging specs ahead of its launch.
https://www.notebookcheck.net/The-OPPO-Pad-registers-with-3C-as-a-device-with-fairly-standard-charging-speeds.591793.0.html