All tickets of Expo Shanghai for May 1 had been sold out, World Expo organizers said.

Tickets for May 1 belong to Peak Day Admission. All together 17 days will be Peak Day during Expo's 184-day period.

Peak Days include "Labor Day" Holiday (May 1-3), "National Day" Holiday (October 1-7), and the last week before the closing date (October 25-30). All the other 167 days are Standard Days.

One Peak Day Admission ticket costs 200 yuan while 160 yuan for one Standard Day Admission ticket. If the Peak Day ticket is not used on the designated day, it can also be used on any Standard Day.

Tickets for May 2 and May 3 are still available for visitors. If they are sold out before April 30, officials will not provide more tickets in the Expo site.

世博热词：“指定日”英语怎么说 >>

【相关中文报道】

上海世博会事务协调局21日宣布，截至20日，中国2010年上海世博会5月1日的门票已售罄，世博园区现场各售票处5月1日当天不销售门票。

5月1日门票属于“指定日”门票。在世博会半年会期里，共有17天为“指定日”。

上海世博局提醒，未持有5月1日世博会“指定日”门票及未向旅行社报名5月1日世博游的参观者，不要盲目前往世博园区，请另行选择日期前往。

据上海世博局介绍，“五一”假期里5月2日、3日两个“指定日”，尚有部分余票。如在4月30日世博会门票预售期结束前，这两天的门票全部售罄，世博园区现场各售票处也将不再销售门票。