A staff member of the booth of Festo demonstrates a bionic robotic arm during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing among others. (Photos: Xinhua)

German Chancellor Angela Merkel (4th L) visits the booth of Bosch Rexroth during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing among others.

A robotic arm lifts a vehicle at the booth of FANUC during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing among others.

German Chancellor Angela Merkel (front C) and Swedish Prime Minister Stefan Loefven (2nd R, front) visit the booth of FRANKA EMIKA during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing among others.

A bionic underwater robot is seen at the booth of Festo during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing among others.

Visitors look at a conveyor displayed at the booth of Dateb Ecomat during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing, among others.

A staff member of the booth of ABB takes photos of displayed robotic arms during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing, among others.

Visitors look at a robot displayed at the booth of THK during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing, among others.

A visitor walks past the booth of Enercon during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing, among others.

A visitor interacts with a robot at the booth of Russia during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing, among others.

Photo taken on Apirl 1, 2019 shows cable car models displayed at the booth of PlusServer during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing, among others.

Photo taken on Apirl 1, 2019 shows cable car models displayed at the booth of PlusServer during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing, among others.

Visitors look at a chassis displayed at the booth of Volkswagen during the 2019 Hanover Fair in Hanover, Germany, on April 1, 2019. With a total of 6,500 exhibitors from 75 countries and regions, the Hanover Fair shows the latest development of technologies for industrial use, including 5G network, artificial intelligence, light-weight manufacturing, among others.