The vivo Z5x that we've been hearing about since the past weekend will go official on May 24 at an event in China which will start at 7.30 PM local time. vivo hasn't divulged any details about the Z5x yet and has only shared a poster which contains the letter 'Z'. That said, the Z5x is rumored to come with a 6.53-inch punch-hole display and pack a 5,000 mAh battery. The vivo Z5x is expected to ship with a Snapdragon 670 or 675 SoC, but it appears we'll have to wait until Friday to know for sure. Source (in Chinese) | Via
Source: https://www.gsmarena.com/vivo_z5x_launch_date_may_24-news-37134.php