Farmer Wu Yulu, 48, rides in a cart pulled by his walking robot near his home in a village at the outskirts of Beijing April 14, 2010. Hobby inventor Wu, who started to build robots in 1986, has invented 47 robots with different functions like jump, paint, drink, pull cart, massage, and help cooking. He will display more than 30 his robots during Shanghai World Expo 2010, and he wants to promote his practical robots into market by the Expo. [Photo/Agencies]