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Lis Cuesta Peraza said Cuba admires the achievements China has made in the past 70 years and expressed gratitude to China for its long-term support and help.

Analysts agreed at Sunday's symposium that cooperation benefits China and the Unites States, while conflicts hurt both; cooperation is always the right path to resolve the China-U.S. trade dispute.

Xi said that China attaches great importance to developing the comprehensive strategic partnership between the two countries and regards Saudi Arabia as an important cooperation partner in promoting the joint construction of the Belt and Road Initiative (BRI).

"With the wide application of technology, more farmers are liberating themselves from toil," Liu said. "Smart agriculture is gradually taking root in the fields."

Independently constructed and operated by China, the BeiDou Navigation Satellite System has been widely used in many countries and regions. "The system started to provide RNSS (Radio Navigation Satellite System) services worldwide last December," said Gao Weiguang from China Satellite Navigation Project Center.