Task: Sentence Expansion
Input (English): At the same time MTRCL changed its Chinese name from " 地鐵有限公司 " ( Subway Limited Company ) to " 香港鐵路有限公司 " ( Hong Kong Railway Limited Company ) , but left its English name unchanged .
Output (English): At the same time MTRCL changed its Chinese name from " 地下鐵路有限公司 " ( Subway Limited Company ) to " 香港鐵路有限公司 " ( Hong Kong Railway Limited Company ) , but left its English name unchanged ; at the same time the system 's Chinese name changed from " 地鐵 " ( " Subway " ) to " 港鐵 " ( " Hong Kong Railway " ) .