Zi Collection, Page Position: Lower Radical: Private (sī) Entry: Gong Kangxi Stroke Count: 4 Page 164, Entry 04 Guangyun (Broad Rhymes), Jiyun (Combined Rhymes), Yunhui (Collection of Rhymes): Pronounced gong. The original form of the character for upper arm. Shuo Wen (Explaining Graphs and Analyzing Characters): The upper part of the arm. History of the Former Han (Qian Han Shu), Biography of Wang Mang: The moon is the essence of the thigh, examining the method of the square and the compass. The sun is the essence of the upper arm, examining the round and matching the compass. Commentary: Jin Zhuo says: Gong means round. Gong is the ancient form of the character for upper arm.