At the military parade to celebrate the 70th anniversary of the founding of new China, 99A main battle tanks lined up and drove solemnly through Tiananmen Square. On that day, as a national model worker, I was invited to watch the ceremony. Looking at the torrent of steel in front of me, I couldn't help but burst into tears: the artillery equipped with the 99A main battle tank was made by me and my colleagues "one nail one rivet". I am a deep hole boring worker in the gun barrel production line. In that year, Beizhong group undertook the processing task of 99A main battle tank artillery barrel. Its processing accuracy was very high. I volunteered to accept this arduous task. Without any reference materials, everything can only start from scratch. During the trial production process, I led the technical team to try many methods, but they still failed to meet the technical requirements. Seeing the delivery time approaching day by day, I simply moved the bed into the production workshop and led the workers to work overtime on the site for a month in a row. Through the self-made transformation of tooling and cutting tools, not only the production problems were overcome, but also the processing efficiency was improved, and the products were finally delivered on schedule with high standards. I have been engaged in boring for more than 30 years. I have participated in the manufacture of more than 10 kinds of artillery and won many honors. I will have no regrets in this life if I can watch the chariots and artillery I built by myself rumble past in Tiananmen Square! (outlook new era)