The four investors said that their money was used for "unauthorised self-serving purposes", but Qiren Holdings and its founder said the investors were belatedly trying to reverse the consequences of their ill-fated investment. SINGAPORE: Four investors are suing Qiren Holdings and its founder Lin Qiren over the alleged misuse of about S$2.4 million (US$1.88 million) that the four said were supposed to go towards investing in mainboard-listed Camsing Healthcare. The claimants are Mr Tan Aik