This is one of a series of papers of the author's dealing with Hong-Lou Meng (Dream of the Red Chamber) from a new angle. The main point of the paper is to refute the "autobiography theory" and to revise the "the sole Cao house theory". The Jia house in the novel is molded after Li house in Suzhou. The leading character in the novel Jia Bao-yu implies Li Ding, the eldest son of Li Xu who was the director of the Imperial Suzhou Silk Factory in the Qing dynasty. Initially, Li Ding wrote several chapters of Shi-Tou Ji. Then Cao Xue-qin took over and rewrote and expanded it. Shi-Tau Ji is a different title of Hong-Lou Meng. There are six Sets of poems on Jia Pao-yu. Autobiography theorists insist that Jia Bao-yu refers to Cao Xue-qin, the author of Hong-Lou Meng. Their interpretation is based on only one of the six sets of these poems. As such, it seems right, but actually it is incorrect. If one considers all the six sets of poems, these are even more contradictories. Now, the present author suggests a trinity theory, i. e. Li Ding, Yen Zhi and Bao-yu in fact refer to the same person. Then, the six sets of poems can be explained easily. As such, these is no contradictory. The theory not only solves the difficulties of these poems, but also proves the correctness of the trinity theory.