Simple Summary: Through a preliminary analysis of animal remains from the large settlement site of Yucun, located east of the Longshan Mountain and associated with the Zhou people during the first half of the first millennium BC, the authors investigated the subsistence practices in relation to the exploitation of animal resources by the site's residents. The examination of animal species representation and the mortality profiles of major domesticates suggest similarities between Yucun and sites associated with the Qin people, located to the west of the Longshan Mountain. However, differences were observed when comparing Yucun to other contemporaneous sites in the middle and lower Yellow River valley. These patterns in animal use strategies appear to have been influenced by local environmental conditions. The first millennium BC saw the expansion of the Western Zhou dynasty in its northwestern frontier, alongside the rise and development of the Qin State in the Longshan Mountain region of northern China. Exploring the subsistence practices of these communities is crucial to gaining a better understanding of the social, cultural, and political landscape in this region at the time. While much of the research to date has focused on the Qin people, the subsistence practices of the Zhou people remain poorly understood. In this study, we analyzed animal remains from Yucun, a large settlement site associated with the Zhou people, located to the east of the Longshan Mountain. These animal remains were recovered in the excavation seasons of 2018–2020. Our results show that pigs, dogs, cattle, caprines, and horses, which were the major domestic animals at Yucun, accounted for over 90.8% of the animal remains examined in terms of the number of identified specimens (NISP) and 72.8% in terms of the minimum number of individuals (MNI), with cattle and caprines playing dominant roles. In terms of the taxonomic composition and the mortality profiles of pigs, caprines, and cattle, Yucun shared similarities with Maojiaping and Xishan, two contemporaneous Qin cultural sites located to the west of the Longshan Mountain, and differ from other farming societies in the middle and lower reaches of the Yellow River valley. Considering the cultural attributes and topographic conditions of these various sites, these findings imply that environmental conditions may have played a more significant role than cultural factors in shaping the animal-related subsistence practices in northern China during the first millennium BC. [ABSTRACT FROM AUTHOR]