A performer parades during the first test run of the International Horticultural Exposition 2011 at the exposition park in Xi'an, capital of northwest China's Shaanxi Province, April 20, 2011. Over 300 carnival-like parades would be held during the International Horticultural Exposition 2011, which would kick off here on April 28, 2011. (Xinhua/Liu Xiao)

Performers parade during the first test run of the International Horticultural Exposition 2011 at the exposition park in Xi'an, capital of northwest China's Shaanxi Province, April 20, 2011. Over 300 carnival-like parades would be held during the International Horticultural Exposition 2011, which would kick off here on April 28, 2011. (Xinhua/Liu Xiao)

The mascot of International Horticultural Exposition 2011 Chang'anhua is seen during the first test run of the International Horticultural Exposition 2011 at the exposition park in Xi'an, capital of northwest China's Shaanxi Province, April 20, 2011. Over 300 carnival-like parades would be held during the International Horticultural Exposition 2011, which would kick off here on April 28, 2011. (Xinhua/Liu Xiao)

The mascot of International Horticultural Exposition 2011 Chang'anhua is seen during the first test run of the International Horticultural Exposition 2011 at the exposition park in Xi'an, capital of northwest China's Shaanxi Province, April 20, 2011. Over 300 carnival-like parades would be held during the International Horticultural Exposition 2011, which would kick off here on April 28, 2011. (Xinhua/Liu Xiao)

Brasilian performers parade during the first test run of the International Horticultural Exposition 2011 at the exposition park in Xi'an, capital of northwest China's Shaanxi Province, April 20, 2011. Over 300 carnival-like parades would be held during the International Horticultural Exposition 2011, which would kick off here on April 28, 2011. (Xinhua/Liu Xiao)