Then, in 1958, with the introduction of Pinyin, a small "Xin Sijiaohaoma Cidian" was produced by the Beijing Commercial Press, but the rapid Han character simplification of the following years made the small (30,000 compound) book obsolete in China.
During the Cultural Revolution, the Four-Corner Method underwent a radical Third Revision during the compilation of the experimental volume of the Xiandai Hanyu Cidian, Commercial Press, Beijing, 1972.