【明報專訊】TWENTY-SIX Singapore Mass Rapid Transit (SMRT) trains manufactured by CSR Sifang Locomotive & Rolling Stock Company Ltd (CSR Sifang) were returned to Qingdao for repair after cracks had been found on them. Because trains manufactured by CSR Sifang are to be used on the Hong Kong Express Rail Link (XRL) and new urban lines, train safety has caused grave concern.