How to explain rotten China in Zhongshan dialect?

(1). Mountain name. Northwest Cang Kun. Said it was Kunlun. Its land is rich in beautiful jade. "Lu Chunqiu Rong Shi": "Therefore, the gentleman Rong Ruo Zhongshan jade, if the orange is on the wood." "Huai Nan Zi Zhen Xun": "If it is like the jade in Zhongshan, it will not change color for three days and three nights." Gao: "Kunlun is also." "Songs of Chu Yan Ji": "I would like to go to the hanging garden in Kunlun and pick the jade from Zhongshan." Wang Yi's Note: "Zhongshan is in the northwest of Kunlun Mountain." "Fu Qin" by Wei of the Three Kingdoms: "The string is the silk of the garden guest, and the emblem is the jade of Zhongshan."

(2) Mountain names in myths and legends. Located in the far north, it is a bitter and cold place. "Shan Hai Jing Overseas North Jing": "Zhongshan God, named Yin Candle, regards it as day and turns it into night; Blow the horn of winter and call for the arrival of summer; Do not drink, do not eat, do not stop; Breathing is the wind; It's thousands of miles long. " Yuan Ke proofreads the note: "It's often cold in Zhongshan, because we can't see the sun. The so-called "cold mountain" in this "big move" is also a "cold mountain". Tang Yangjiong's Tombstone of Shi Yu Wengong, Governor of Tangtong: "Candle dragon guards Zhongshan day and night, and Peng Yun is in the Bohai Sea. "

(3). Mountain name. Purple Mountain. In the northeast of Nanjing, Jiangsu Province. During the Three Kingdoms period, Wu avoided the taboo of his ancestors and changed his name. In the Song Dynasty, Zhongshan was renamed. In the Song and Zhou Dynasties' "Clear Waves and Biezhi", "Wang retired to Zhongshan and hated Lv Jifu." Chen Qing Song Wei's "Drunk in the Taiping River Estuary" words: "After Zhongshan Lake, the night is dry."