Visitors watch a humanoid robot dancing at the 20th National Robot and Artificial Intelligence Competition in Shunde District of Foshan, south China's Guangdong Province, Oct. 24, 2018. The 20th National Robot and Artificial Intelligence Competition kicked off here on Wednesday. More than 200 teams from 78 Chinese colleges will take part in 49 competitions under 13 categories. (Xinhua/Liu Dawei)