新四军的第一批手榴弹是如何研制出来的？过程实在艰辛！

Core Points - The article narrates the story of Wu Wenyu, a young mechanic who became a key figure in the New Fourth Army's efforts to produce hand grenades during a time of severe supply shortages [1][3][5] Group 1: Background and Initial Challenges - Wu Wenyu joined the New Fourth Army as a mechanic but had no prior experience with military equipment, particularly explosives [1][3] - Following the Wanan Incident, the army faced a complete halt in supplies, prompting the need for self-sufficiency in weaponry, particularly hand grenades [3][5] Group 2: Establishment of the Hand Grenade Factory - Wu Wenyu was appointed as the director of the hand grenade factory despite his lack of knowledge about explosives, motivated by the need to overcome difficulties [5][8] - The factory was established in a guerrilla warfare environment, utilizing temporary locations and local resources to set up operations [5][8] Group 3: Production Process and Success - The first batch of hand grenades was developed by disassembling existing grenades to understand their structure and creating specialized workshops for different components [7][8] - The initial production faced challenges, including worker retention due to low wages, but eventually led to the successful creation of 50 grenades, which were later improved for better explosive effectiveness [8][10] - The successful testing of the hand grenades was met with praise from army leadership, highlighting the innovative efforts of Wu Wenyu and his team [10]