Rescuers work at the site of explosion at a house on Nanhuan West Road in Fushan County in the city of Linfen, north China's Shanxi Province, April 2, 2017. Nine bodies have been found following an explosion at a house. The illegal storage of explosives was believed to cause the blast. The blast occurred around 10:30 p.m. Saturday, burying 10 people, according to an official with the city's publicity department. (Xinhua)
Photo taken on March 29, 2017 shows a captive balloon at a testing ground in Liu'an, east China's Anhui Province. The captive balloon is an air platform carrying various devices, such as warning radar, video surveillance equipment, fog detection devices, communication relay devices and imaging equipment. The balloon is expected to play a role in precaution and detection, environmental surveillance, security and protection monitoring. (Xinhua/Guo Chen)
Photo taken on March 28, 2017 shows a captive balloon at the 38th Research Institute of China Electronics Technology Group Corporation in Hefei, capital of east China's Anhui Province
Photo taken on March 29, 2017 shows a captive balloon floating in air at a testing ground in Liu'an, east China's Anhui Province.
Robots take part in a soccer match during the 2017 RoboCup in Rizhao, east China's Shandong Province, April 2, 2017. The 2017 RoboCup attracted 418 teams around China. (Xinhua/Zhang Lei)