Guohua Science and Technology * * * undertakes and participates in 33 key scientific and technological projects, including 5 national-level projects and 28 scientific research projects issued by provincial and municipal science and technology authorities and cooperated with mining (group). So far, item 15 has passed the technical appraisal and item 12 has passed the acceptance. Among them, the overall technical level: 6 international advanced, 9 international advanced and 2 domestic advanced; The new technologies and equipment independently developed by Guohua Science and Technology have been granted national patents 18, and accepted patents 10, including invention patents 13; Because of its technical advantages, it has been recognized by the competent technical department of coal industry. In the past six years, with the approval of the State Administration of Work Safety, he presided over or participated in the compilation and revision of nine coal industry standards and formulated five new standards.