The Oil Pavilion in Puxi zone of the Expo site greeted its millionth visitor on Sunday.

The visitor surnamed Li from Guiyang, Guizhou Province, received souvenirs from pavilion director Liu Junjie.

Li said she heard that the pavilion was very popular and found it was spectacular. She queued for four hours outside the pavilion.

Exterior walls of the pavilion are decorated with crisscrossed petroleum and gas pipes, which emphasize industry characteristics and give the pavilion a modern appearance. The whole pavilion resembles a huge energy-processing network, symbolizing that abundant underground oil is the main impetus for the city.

Construction materials of the building adopt new environmentally friendly oil derivatives as an exploration of widespread uses of petroleum and petrochemical products.

The pavilion is divided into three sections: the past, present and future, displaying respectively the evolution of petroleum during millions of years, vital roles of petroleum for human history and city development, and prosperous visions for the development of petroleum.

The pavilion was built in Zone D by three Chinese oil companies: China National Petroleum Corp, China Petrochemical Corp, and China National Offshore Oil Corp.