《水经注·卷十一》
《中山记》说：八渡、马溺，都是山弯里的险要之处，两个关口地势相接，说不定此城就是当年关尉的治所。但异名的由来却不清楚。马溺水又往东流注入滚水。惋水又往东流经中人亭南，《春秋左传》：昭公十三年立为王国，王莽改名为常山。北魏皇始二年立。长星川又往东北流，与沱水汇合，此渠有时无水，有时通水，不是长流不断的。
又东南流，胡泉水注之，水首受胡泉，径上曲阳县南，又东径平乐亭北，左会长星川，东南径卢奴城南，又东北，川渠之左有张氏墓，冢有汉土谷太守议郎张平仲碑，光和中立。川渠又东北合滱水，水有穷通，不常津注。
"Zhongshan Ji" says: Badu and Madishui are both dangerous places in the mountain bends. The two passes are adjacent to each other, and the city may have been the governing place of the border guards at that time. However, the origin of the name is unclear. The Madishui River flows eastward and joins the Gonshui River. The Wanshui River flows eastward again past the Zhongren Pavilion. According to the "Spring and Autumn Annals, Zuo Zhuan": In the 13th year of Zhaogong, it was established as a kingdom, and Wang Mang changed its name to Changshan. Established in the second year of Emperor Shi of Northern Wei. The Changxing River flows northeast again and joins the Tuoshui River. Sometimes there is no water in this canal and sometimes there is water. It does not flow continuously all the time.
<s>[INST] Identify the tone and emotion conveyed in the Classical Chinese text and explain how it is achieved in English: 又东南流，胡泉水注之，水首受胡泉，径上曲阳县南，又东径平乐亭北，左会长星川，东南径卢奴城南，又东北，川渠之左有张氏墓，冢有汉土谷太守议郎张平仲碑，光和中立。川渠又东北合滱水，水有穷通，不常津注。 [/INST] 
Tone and emotion: Neutral, informative
Explanation in English: This passage describes the course of a river and its tributaries, as well as the historical sites along its banks. It provides factual information in a neutral and objective tone.</s>
Identify the tone and emotion conveyed in the Classical Chinese text and explain how it is achieved in English: 又东南流，胡泉水注之，水首受胡泉，径上曲阳县南，又东径平乐亭北，左会长星川，东南径卢奴城南，又东北，川渠之左有张氏墓，冢有汉土谷太守议郎张平仲碑，光和中立。川渠又东北合滱水，水有穷通，不常津注。
user
Tone and emotion: Neutral, informative
Explanation in English: This passage describes the course of a river and its tributaries, as well as the historical sites along its banks. It provides factual information in a neutral and objective tone.
assistant