Yang Zhongmin: Male, born in February 1973, Chinese nationality, no permanent residence abroad, high school education. From 1995 to 2004, he served as the technical manager of Dayi Construction Factory; from May 2004 to June 2013, he served as assistant general manager, technical director and production director of Dahongli Co., Ltd. From July 2013 to present, he serves as the director and deputy general manager of Dahongli. The term of the issuer's director and deputy general manager is from June 6, 2019 to June 5, 2022. In 2015, the company was awarded the "Sichuan May 1st Labor Medal" by the Sichuan Provincial Federation of Trade Unions: "a plate-type impact frame for impact crushers", "a crusher feed hopper opening device", "a crusher feed hopper opening device" owned by the company One of the inventors of more than 30 patents including "Vertical Shaft Impact Crusher with Wheel Guard". Among them, the patent for "a crusher feed hopper opening device" was awarded the silver medal of the Chengdu Municipal People's Government's "Chengdu Patent Award" in 2013, and the patent for "a vertical shaft impact crusher with a runner guard" was awarded in 2015 Won the gold medal of "Dayi County Patent Award" in 2016.