The vehicles, equipped with Baidu Apollo autonomous driving systems, ran on the test roads with a total length of up to 114 km in the Cangzhou Economic and Development Zone.
The web celebrities followers extended from mainland to Hong Kong, Macao and Taiwan, whose residents accounted for 2.5 percent of the total fan base.
The upcoming summit will be the first after a membership expansion to include India and Pakistan last year.
The virus has infected over 15,000 Israelis and killed nearly 200 people.
The violent social unrest last year dealt a severe blow to Hong Kong's economy and society.
The unemployment rate is now 14.7 percent and many people therefore cut back on spending.
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The water transferred is enough to fill West Lake — a well-known lake in Hangzhou, Zhejiang province — about 2,140 times.
The volume accounted for more than 20 percent of China's total during the period, said the China Musical Instrument Association at the Music China 2019 expo, which opened Wednesday in Shanghai.
The whole military should comprehensively implement the Thought on Socialism with Chinese Characteristics for a New Era and the spirit of the 19th CPC National Congress, Xi added.
The vaccine, by drugmaker Moderna and NIAID, will be tested on 20 to 25 humans to determine whether two doses will be safe and generate an immune response to protect against infection, with results available in July or August, NIAID's Dr Anthony Fauci told The Wall Street Journal.