Palace Museum had more visitors on Sunday than other major Beijing sites

Beijing launched an hourly updated online index of crowds at major tourist sites on Sunday, the day that China's railway broke its record for the amount of passengers carried on any single day of a May Day holiday.

The index, launched at bjta.gov.cn on Sunday, the first day of the holiday, covers six major sites in Beijing, including the Palace Museum, Summer Palace and Badaling section of the Great Wall. It indicates the size of crowds according to a five-level system, with level five being the most crowded.