The testing work is expected to start in Porto Metro's network in the second half of next year. The Chinese trains will be shipped to Portugal between 2021 and 2023.
The teenager on Sunday died in Tugrug district of the province on the way to a hospital.
The topic "the murderer of Zhang Yingying is sentenced to life imprisonment" had received some 750 million views and 92,000 comments on the social media platform by 2pm on Sunday, and each trending topic related to the case had been viewed hundreds of millions of times.
The technology can also be used to help the government register dogs more efficiently, and once the database becomes large enough, it can also help find lost dogs, Megvii said.
The three countries will "have great potential to demonstrate to other countries in Asia and the world how it will be possible to reduce CO2 emissions and at the same time create opportunities for industrial development", said Masaru Yarime, an associate professor at the Division of Public Policy at the Hong Kong University of Science and Technology.
The top 10 words and expressions were selected by an algorithm based on a corpus of 1 billion Chinese characters collected from publications of nine print media outlets, 20 broadcasting or television stations and four news websites between Jan 1 and Nov 30, said the center, adding that the final results were confirmed by its staff.
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The three parks also began online ticket purchases, with 30,000 visitors swiping the QR code on their mobile phones.Saturday was the first day of the three-day International Workers' Day holiday. About one-tenth of China's population is expected to travel during the holiday, according to data from the China National Tourism Administration.
The technology has been used in airports in the United States, Great Britain, the Netherlands, Australia and Japan.
The theme of this year's forum is "Openness and Innovation: Shaping the Global Economy". As of the end of November, over 700 guests have registered, and the number of participants has totaled 1,000.
The think-tank salon covered three themes: How to better understand the new economic globalization, and the changes in the national and international environment; how to overcome hindrances and gain more sense of progress; and how to promote the new path of development with innovation and deeply integrate it with the national development strategy.