October 24, 1991 was the 30th anniversary of the rise of the technical cooperation activities of employees known as the "great pioneering work" of the Chinese working class. Li Peng, the premier of the State Council, wrote inscriptions: "Bestly give full play to the advantages of the staff and technical team, and make new contributions to economic construction." Song Renqian, Ni Zhifu, Song Jian and other leading comrades also wrote a word.