In 2022, Huang Yizhong, "Nanning Craftsman", is the director of the lime kiln of Guangxi Warner New Materials Co., Ltd. The calcination section of the lime kiln is the first production process of the semi-finished product "lime" of nanometer calcium carbonate, and the quality of lime directly determines the product quality of nanometer calcium carbonate. Huang Yizhong has been engaged in the calcination of lime kiln for 15 years. With his exquisite calcination technology, Warner lime kiln production has achieved the "ceiling" level of control technology in domestic peer enterprises. "I understand the craftsman's spirit is to focus on the promotion and improvement of professional technology in his own field and constantly pursue excellence. While pursuing excellence, he constantly innovates his thinking and controls details to the extreme," said Huang Yizhong. @Nanning Federation of Trade Unions