3.7 kilograms. Ci Hai (6th edition) was edited by Ci Hai of Zhonghua Book Company and officially published by Shanghai Dictionary Publishing House on September 2, 20091day, weighing 3.7kg..9 On September 1957, 17, Chairman Mao received Mr. Shu Xincheng, one of the editors of Ci Hai in Shanghai. Shu put forward the idea of editing dictionaries and encyclopedias, and Chairman Mao said, "I quite agree." Accordingly, the Central Committee handed over the task of revising Ci Hai to Shanghai.