Shanghai will boost the number of Metro trains 150 percent by 2010 to handle the expected 70 million visitors to the city during World Expo.

The city will have about 200 more Metro trains within this year.

Newly opened lines 6, 8 and 9 are adding cars as well as Line 1 and Line 2.

During the Expo, Shanghai will have 200,000 more visitors per day and 400,000 on the busiest days. The subway system will be expanded to 400 kilometers by that time and will shoulder nearly half of the flow.

Metro lines 4, 6, 7 and 8 will have a stop at the Expo site, and No. 13 will be the trunk line within the 5.28-square-kilometer Expo site, Ying said.

The Shanghai government invested 30 billion yuan (US$4.22 billion) in Metro line construction each year. The Metro will consist of 35 to 40 percent of the city's transportation annually once fully developed.

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