Chinese government withdraws protection for detained journalist . New Express apologizes ; said it wanted to fact check journalist 's work . Reporter was detained on suspicion of damaging a company 's reputation . Analyst says cases of erosion of press freedom in China .
Chinese newspaper withdraws support for detained journalist . New Express apologizes ; said it failed to fact check reporter 's work . Reporter was detained on suspicion of damaging a company 's reputation . Analyst says cases shows limits of press freedom in China .