Dongda Coal Mine is better than Liu Zhuang Coal Mine. Dongda Coal Mine and Liu Zhuang Coal Mine are both large coal mines in Zibo, Shandong Province. Dongda Coal Mine is a national key protected coal mine with large production scale, high coal output and relatively perfect information infrastructure. Compared with Dongda Coal Mine, Liu Zhuang Coal Mine has relatively small production scale, slightly lower coal output and imperfect equipment and information infrastructure, so Dongda Coal Mine is better than Liu Zhuang Coal Mine.