[transport concept Hong Kong stock decline enlarged Air China H shares fell 8%] Financial Associated Press, May 31, Transportation concept Hong Kong stock decline widened in the afternoon. As of press time, Air China (00753.HK) fell 8 per cent to a half-year low, China Southern Airlines (01055.HK) fell 6 per cent and Guangzhou-Shenzhen Railway (00525.HK) fell 6 per cent.