Unicode 5.2
Character Definition ( in grammar ) interjection ; to express sadness ; sorrow and emotional excitement
Pinyin AI4 Jyutping oi2
Big5 HK Supplementary Character Set A07E IRG Hong Kong SAR A07E

Unicode 12.1
Character Definition ( in grammar ) interjection ; to express sadness ; sorrow and emotional excitement
Pinyin ài Jyutping oi2
Big5 HK Supplementary Character Set A07E

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