In return for launched the K12 in April and the Plus model will follow this weekend. The Oppo K12 Plus will be launched in China on October 12 at 2:30 PM local time in white and black colors.
From the teasers shared by Oppo on Weibo, it appears that the K12 Plus will have a display with a centered hole and will have two cameras on the back connected by a circular flash.
Oppo K12 Plus
Additionally, Oppo announced that the K12 Plus would pack a 6,400mAh battery with 80W wired charging and 10W reverse wired charging. A few more features of the Oppo K12 Plus could be revealed before its debut on October 12.
Source (in Chinese)