Functions as both verb (自拍一张) and noun (一张自拍). The verb takes 张 for photos and 段 for short videos. Related: 自拍杆 (selfie stick), 美颜自拍 (beauty-filtered selfie).
culture
The hashtag-like genre is huge on 小红书 and WeChat Moments; beauty cameras 美图 and 轻颜相机 dominate phone installs.