Miao Vowel Sign Uog (U+16F7F) is a Unicode spacing combining mark from the Miao block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class L (left-to-right), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as 𖽿 or 𖽿. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.