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Before the new discovery, China's oldest bone tools, dating back 35,000 years, were found in Guizhou province.

Beijing and Shanghai, with respective per capita incomes of ,805 and ,799, according to the World Bank, are already regarded as comfortably high-income－on a level similar to the Czech Republic, Portugal and Bahrain.

Before knocking, he asked fellow police officers to be ready for a possible situation. A man opened door and looked slightly alarmed when he saw several policemen outside. Fan immediately recognized he was the suspect, surnamed Tian.

Before the deal, UBTech signed agreements for AI education with companies, organizations and government agencies in Russia, Indonesia and Uzbekistan. It also inked a strategic cooperation agreement with the UNESCO Higher Education Innovation Center last year to promote AI education.

Before the pandemic, New York school buses transported about 150,000 students a day. But nearly 75 percent of school-bus breakdowns and delays have involved special education buses, according to an analysis done by Education Week, an independent news organization that covers K-12 education.