This paper is the second half of the author's study on Shang ancestors and ancestral worship. The first part was published on The Proceedings of the 21st Annual Seminar of the Association of Chinese Etymology (May 5, 2010). Therein, the author discussed the original meanings of the words zu 祖, pi 妣, bao 報, shi 示, i.e.. words used by the Shang people to name their different types of ancestors, and made a structural and componential study on them together with their prefix and suffix. The author also pointed out that before the founding of the Shang Dynasty, there were a system change from cemetery sacrifices to temple sacrifices. This change generated the birth of Shang people's family law.On the present paper, the author first examines the different versions of the xi-niao 玄鳥 mythology and elucidates the contents of the more credible one. The author then compares the modes of thinking as applied by the Shang or by the Chou people or by the primitives for the recognition and classification of their ancestors. The author points out that the Shang people used one that was both concrete and abstract, and that the Chou people both concrete and abstract. The Shang and the Chou people were different from the primitives, who used concrete mode of thinking which also could be understood as totemic.