Visitors view a systematic demonstration of a smart blackboard during the 16th China International Software & Information Service Fair in Dalian, northeast China's Liaoning Province, June 12, 2018. The service fair, with the participation of 750 exhibitors, kicked off here Tuesday. (Photos: Xinhua)

A woman manipulates mechanical arms through 5G technology during the 16th China International Software & Information Service Fair in Dalian, northeast China's Liaoning Province, June 12, 2018. The service fair, with the participation of 750 exhibitors, kicked off here Tuesday.

The 16th China International Software & Information Service Fair is held in Dalian, northeast China's Liaoning Province, June 12, 2018. The service fair, with the participation of 750 exhibitors, kicked off here Tuesday.

Exhibitors are seen during the 16th China International Software & Information Service Fair in Dalian, northeast China's Liaoning Province, June 12, 2018. The service fair, with the participation of 750 exhibitors, kicked off here Tuesday.

The 16th China International Software & Information Service Fair is held in Dalian, northeast China's Liaoning Province, June 12, 2018. The service fair, with the participation of 750 exhibitors, kicked off here Tuesday.

A smart blackboard is launched by an exhibitor during the 16th China International Software & Information Service Fair in Dalian, northeast China's Liaoning Province, June 12, 2018. The service fair, with the participation of 750 exhibitors, kicked off here Tuesday.

People visit the 16th China International Software & Information Service Fair in Dalian, northeast China's Liaoning Province, June 12, 2018. The service fair, with the participation of 750 exhibitors, kicked off here Tuesday.