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"China is changing so rapidly. If you are away from it for four or six years, you will lose contact with your network and the ability to reintegrate with them after returning," he said.

"China commits itself to opening up wider and deeper to promote common development across the world," he said.

"CIFTIS will serve as an important platform to enhance understanding on the role of services and services trade as the backbone of the economy, strengthen policy dialogue and coordination, provide trade and investment facilitation for business communities," she wrote.

"China and Chinese people are Serbia's best friends," he added.

"China has said many times that it is never eager to take part in a trade war, but it is not afraid to participate if necessary. China will firmly defend its legitimate rights," he said, adding that the country will enhance cooperation with its global trading partners and firmly defend free trade principles and a multilateral trade mechanism.