A ritual girl welcomes visitors at the Shanghai World Expo Park on Tuesday, April 20, 2010. [CNSphoto]

The Shanghai World Expo Park is going on trial operation from Tuesday to Sunday, with five comprehensive drills to be performed during the period.

According to the Yangtse Evening Post, the first comprehensive drill starts today, with an estimated 200,000 people participating. The Expo Park is to open at 9:00 am and close at 8:00 pm during the trial operation.

(Xinhua News Agency April 20, 2010)