Official website of Kaifeng Quark New Materials Co., Ltd. shows that the recruitment age requirements are: 30-45 years old, education requirements: chemical engineering and other related majors, undergraduate science and so on. So 40 years old is ok.

Kaifeng Quark New Materials Co., Ltd. is a high-tech enterprise specializing in research and development, manufacturing, sales and service of functional materials. Headquartered in Xili Town, Nanshan District, Shenzhen, the company has a team of doctoral and master students engaged in chemical production and research and development for many years, and cooperates with well-known domestic engineering colleges, Harbin Institute of Technology, Tsinghua University and other universities to develop new projects.