Hongxian may refer to:
Red thread of fate (紅線; hóngxiàn), invisible thread that connects destined lovers in traditional Chinese belief "The Tale of Hongxian", a Chinese legend about a female assassin named Hongxian (literally: Red Thread) Hongxian (洪憲; 1916), era name of Yuan Shikai's reign as Chinese Emperor Hongxian Monarchy (Chinese: 洪憲帝制)
See also Hung Sin Nui (1924–2013) or "Red Thread Girl", Cantonese opera performer