Task: Question Generation
Input (English): Context : In the Beijing International Exhibition on Police Equipment held on May 2005, the exhibition showed the JS 7.62 sniper rifle after undergoing 8 months with field trails Feedback showed that the sniper rifle system allowed the 7.62mm round to penetrate a residential wall greater than 6mm, and showed high tolerance level with no malfunction throughout the 8 month field test. 
Subject : JS 7.62 
Relation : service entry
Output (English): What year was JS 7.62 introduced?