Does anyone know what Dongying Jiayang Precision Metal Co., Ltd. does?

Jiayang, for precision metal manufacturing, such as wax casting, metal processing and other machining industries, it seems that the festival fee is 1 000 yuan. Although not as good as before the economic crisis, the scale is still relatively large. If the shift seems to be two shifts, the salary is ok. I work in a company near him and don't know much about it.