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An instructor assigned to an aviation brigade of the air force under the PLA Southern Theater Command helps pilots to go through pre-flight procedures prior to flight training on April 4, 2018. (Photo/eng.chinamil.com.cn)
An instructor assigned to an aviation brigade of the air force under the PLA Southern Theater Command helps pilots to go through pre-flight procedures prior to flight training on April 4, 2018. (Photo/eng.chinamil.com.cn)