https://www.reuters.com/article/us-china-tencent-wedoctor/tencents-wedoctor-raises-500-million-values-firm-at-5-5-billion-pre-ipo-idUSKBN1IA08G >Chinese online healthcare solutions platform WeDoctor, which is backed by tech giant Tencent Holdings Ltd , said on Wednesday it had raised $500 million from several investors, valuing the firm at $5.5 billion ahead of a listing this year.