This follows the publication of 400 papers implicating the Chinese government in the pre-meditated mass incarceration of Muslims for thought crime.
The Chinese foreign ministry says in a statement Sunday that Vladimir Ivanovich Voronkov traveled to Beijing and the Xinjiang Uighur Autonomous Region from Thursday to Saturday last week.
Many Uyghurs don't speak out due to fear of repercussions and others don't because they have been indoctrinated against criticising the Chinese government.
With thousands of families burning coal to survive in arctic temperatures, Mongolia is now home to the most poisonous air on the planet.
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