The strong earthquake was also felt in Ecuador, Colombia, Brazil and Bolivia.
The study of Mandarin has grown in tandem with increasing cooperation in trade and economics between China and Russia.
The symposium was held in Shenzhen after the central government announced it will build the city into a pilot demonstration area of socialism with Chinese characteristics on Aug 18.
The system, called the Bioregenerative Life Support System (BLSS), allows water and food to be recycled and is key to any Chinese probes to the moon or beyond.
The surveys included questions about perceptions of parental affection, overall health, chronic conditions and depressive symptoms.
The team, which is under the emergency ministry, was launched in November 2018. It consists of the previous firefighting force under the public security authority and the previous forestry force under the armed police.
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The surveyed urban unemployment rate is calculated based on the number of unemployed people who have participated in the employment survey in urban areas.
The survivor, Ma Hongxiang, had testified that he witnessed Japanese soldiers dragging Chinese civilians to a square and shooting those without relatives with machine guns before burying the bodies in mass graves as the crime unfolded in the winter of 1937-38.
The sub-indices for production and new orders came in at 52.1 and 51.4 respectively, both showing robust momentum.
The surveyed unemployment rate among job seekers holding junior college diploma or higher degrees and aged between 20 and 24, the majority of whom are fresh college graduates, stood at 19.3 percent in June, up 3.9 percentage points from the same month of last year.