Disappointing guidance (I, II) from Sohu.com (SOHU -14.5%) and majority-owned online game developer Changyou.com (CYOU -12%) takes a toll on some recently high-flying Chinese Internet stocks. SINA -5.9%. BIDU -2%. RENN -4.4%. Bucking the trend, interestingly, is gaming concern Perfect World (PWRD +6.2%), perhaps out of a belief that Sohu/Changyou's loss is Perfect World's gain.