Chou Pang-Yen (A.D.1056-1121) has often been regarded as the best tz's poet of the Sung dynasty. Wang kuo-wei called him "the Tu Fu of the tz's poetry" Ch'en T'ing-cho (1853-1892) thought that Chou's lyrics had the excellent quality of "profundity and peripety" (ch'en-yu tun-ts'o). This article compares such qualities with the Aristotelian concepts suggested in the Poetics. It attributes Chou's achievements partly to the characteristics of the Chinese classical language, partly to the characteristics of the Chinese classical language, particularly lack of inflection. Because of these characteristics, the question of who the speaker is in the lyric Lan-ling Wang makes it seem obscure, and the tense of the verbs therein is somewhat confusing. But after a close reading of the text, the article concludes that the lyric is actually a description of the poet's departure from the Sung capital, Pienliang ( modern Hangchow of Chekiang ) in the south, when he was compelled to leave the office in the Imperial College in the spring of 1087 at the age of 31. It was not written when he left for Chenting ( modern Chengting of Hopei) in the north at age of 62, has as has been suggested by all major contemporary scholars on tz's poetry. Furthermore, the verbs in the lyric, as the article points out, appear in most varied tense, which make the images in the lyric more complex than the use of a singular tense. And the technique specifically effects the impression of tun-ts'o�o. The article goes on to try to establish the fact that Chou left the Imperial College because, after Emperor Jen-tsung died in A.D1085, conservative political forces rose to power, and many officials associated with Wang An-shih's (1021-1086) reforming group were at the time, in a long rhapsody (fu) presented to the throne in 1083, he criticized the earlier conservative influences upon the educational and intellectual circles and praised the achievements of the reform. During the power changeover after the Emperor's death, Chou's major superior in the College, an opportunist, purged the reform supporters severely. Chou must have been a victim of such a situation. On the other hand, when Chou was a student during 1079-1083 and later served as a supervisory faculty member during 1084-1086 at the College, he definitely had close relations with singing and romantic tz's songs about his relations with them. The article include a detailed study of the College's location in the capital to show that the school was near a most luxurious area with numerous pleasure lyricist, songwriter, and musician, Chou naturally developed intimate relations with possibly the best of courtesans. While such relationships were quite common in Sung China, it was forbidden for an official to stay overnight at a courtesan�s house. From what he said in one of his lyrics, Shao-nien yu, Chou obviously committed this kind of offense and, consequently, became vulnerable to attackers. He must have been compelled to cease relations with a beloved courtesan and to leave the capital, where he had stayed for eight years. In a letter to a friend written prior to his departure, Chou mentioned that his life had been in danger. Without taking all the above personal adversities into consideration, Lan-ling Wang may not be fully understood. In the last section, the article explains how the poet skillfully employed well-chosen poetic vocabulary loaded with "accumulated" images and metaphors inherited from the long Chinese literary tradition, in order to create maximum aesthetic effects.