A participant from ZZU-Droid team cools down a robot soccer player at a break of the competition against TJArk team 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 

A judge places a ball before robot soccer players start to 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 

Participants from ZZU-Droid team cool down robot soccer players at a break of the competition against TJArk team 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 from TJArk team are charged ahead of a competition against ZZU-Droid team 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 from TJArk team are charged ahead of a competition against ZZU-Droid team 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 

A participant from SPQR team chats with teammates after a competition during 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 are charged next to security guards before a competition 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 

A participant cools down robot soccer players at the break of a competition 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 

A data cable is seen on the head of a robot soccer player at the break of a competition 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 

A participant from TJArk team works next to robot soccer players at the break of a competition against ZZU-Droid team 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 

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 falls 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 participant from SJTU team works next to robot soccer players, which are being charged, at the break of a competition against SPQR team 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 

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 

A participant tests a robot goalkeeper ahead of a competition 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 

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 

A participant from TJArk team holds a robot soccer players into a football pitch for a competition against ZZU-Droid team 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 

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 

Participants from TJArk team celebrate after their robot soccer player scored a goal during a competition against ZZU-Droid 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 

A logo of Alibaba Group is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A Hikvision logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A China Tower's logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A Hikvision logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A China Tower's logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A Hikvision logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A CRRC's logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A CRRC's logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A model of CRRC's tram car is displayed at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

Staff members stand at CRRC's booth at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A Hikvision logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A logo of China Shipbuilding Industry Corporation (CSIC) is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A staff member stands at CRRC's booth at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A delivery drone is displayed at SF Express's booth at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

Staff members chat at CRRC's booth at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A delivery drone is displayed at SF Express's booth at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A CRRC's logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

People visit Huawei's booth at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A security robot with Huawei 5G technology is displayed at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A Huawei logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A Huawei logo is seen at an exhibition during the World Intelligence Congress in Tianjin, China May 16, 2019. REUTERS/Jason Lee 

A surveillance camera is seen next to containers at a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A worker cycles past containers outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A worker cycles past containers outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A labourer works outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

Labourers rest next to containers outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

Labourers rest next to containers outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A labourer works next to an Audi car on a truck outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A container is transported out of the gate of China Customs at Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

Labouers rest outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A container is transported into a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

Containers are seen at a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

Cars are seen next to containers at a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A man rests on a bicycle next to containers outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A truck carrying steel products drives past containers outside a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

Containers are seen at a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A man walks next to containers in a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

Containers are seen at a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee 

A container is carried onto a truck in a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee