Costa Rican engineer Arturo sings a Chinese song during the second preliminary round of the Chinese Bridge competition in San Jose, capital of Costa Rica, on March 17, 2010. (Xinhua Photo)

Costa Rican student Margarita Arroyo writes a Chinese poem during the second preliminary round of the Chinese Bridge competition in San Jose, capital of Costa Rica, on March 17, 2010. (Xinhua Photo)

Costa Rican student Marco Anchia performs Taijiquan during the second preliminary round of the Chinese Bridge competition in San Jose, capital of Costa Rica, on March 17, 2010. (Xinhua Photo)