Jia Yan instructs one of his apprentices in processing a spare part. As a skillful technician, Jia passes on his long-acquired technical know-how to his apprentices without any reservation. [Photo by Dong Ning/China.org.cn]
Jia Yan, 52, is the chief technician of China Aerospace Science and Industry Corporation whose job is to produce and install a critical part of missiles commonly called the "eyes."
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