Small Ela Luk is a Chinese intersex human rights activist and the first intersex person to openly acknowledge her biological sex characteristics in Hong Kong. She was born with partial androgen insensitivity syndrome (PAIS). Luk lived as a male for 36 years, and now identifies and lives as a woman, after changing her sex characteristics from intersex to female through gender-affirming surgery, upon doctors' advice to undergo the surgery because her type of PAIS would most likely have caused cancer.