The flag for Hong Kong, which may show as the letters HK on some platforms.
The Flag: Hong Kong SAR China emoji is a flag sequence combining ? Regional Indicator Symbol Letter H and ? Regional Indicator Symbol Letter K. These display as a single emoji on supported platforms.
Flag: Hong Kong SAR China was added to Emoji 1.0 in 2015.
U+1F1ED
U+1F1F0
?? Regional indicator symbol letter h
?? Regional indicator symbol letter k