The two also vowed to strengthen bilateral ties in the face of global challenges.
The two parties also work on using AI technologies to improve traffic monitoring and management to turn the city into a pilot for smart transport development.
The two-day Africa Rail 2017 conference and exhibition ended on Wednesday.
The two duty-free shops in the island, one in the provincial capital of Haikou and the other in the resort city of Sanya, received 1.47 million customers and sold more than 7 million items in the first half.
The two manuals, edited by the Zall Foundation in Wuhan, capital of central China's Hubei Province, were published in both Chinese and English on Saturday.
The trend brings in an inevitable change to the current jewelry industry, as millennials prefer less pricy products with good designs.
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The twice-yearly event, also known as the Canton Fair, has been considered the largest global trade fair in scale since the novel coronavirus outbreak.
The ubiquitous electric IoT is an intelligent service system making full use of modern information technologies and advanced communication techniques. These include mobile internet and artificial intelligence, with overall perception, efficiency and flexible application capacity to access information in each link of the power system.
The two presidents also talked about the situation in Syria. Xi said any use of chemical weapons is unacceptable and that the path of political settlement should be followed.
The two-province success on the Xin'an River has considerable reference value for other efforts on big rivers to control water pollution and provide treatment.