A robot soccer player of SJTU team scored a goal during a competition against SPQR team at the RoboCup Asia-Pacific Tianjin Invitational Tournament 2019, in the side event of the World Intelligent Congress in Tianjin, China May 17, 2019. REUTERS/Jason Lee

Robot soccer players compete on a football pitch during the RoboCup Asia-Pacific Tianjin Invitational Tournament 2019, in the side event of the World Intelligent Congress, in Tianjin, China May 17, 2019. REUTERS/Jason Lee

Robot soccer players fall on a football pitch during a competition at the RoboCup Asia-Pacific Tianjin Invitational Tournament 2019, in the side event of the World Intelligent Congress, in Tianjin, China May 17, 2019. REUTERS/Jason Lee

A robot soccer player tries to stand during a competition on a football pitch at the RoboCup Asia-Pacific Tianjin Invitational Tournament 2019, in the side event of the World Intelligent Congress, in Tianjin, China May 17, 2019. REUTERS/Jason Lee

A robot soccer player from SJTU team tries to stand during a competition against SPQR team on a football pitch at the RoboCup Asia-Pacific Tianjin Invitational Tournament 2019, in the side event of the World Intelligent Congress, in Tianjin, China May 17, 2019. REUTERS/Jason Lee

Robot soccer players compete on a football pitch during the RoboCup Asia-Pacific Tianjin Invitational Tournament 2019, in the side event of the World Intelligent Congress, in Tianjin, China May 17, 2019. REUTERS/Jason Lee