This article introduces four noteworthy papers published in China\'s top journals in Summer 2021, all of which are phenomenon-driven and design-based case studies. The first paper employs a process tracing approach to analyze the failure of policy coordination based on an empirical case regarding the revision of the price catalog for basic medical services in Province F. The second paper develops a triple mechanism framework to account for the distortions in China\'s grassroots policies. With a most similar case design, the third paper proposes a typology framework for campaign-style environmental governance and compares the mobilization models for environmental governance. Based on a grounded theory approach, the final paper analyzes data from thirty-eight public crises cases to reveal the mechanism of political mobilization for emergency management. These studies explain clear theoretical puzzles brought about by practical problems, and they provide a sense of the research designs in the case studies. They show three types of case studies: (1) two single case studies, one with a process tracing approach and the other illustrating a developed theoretical framework, (2) a comparative case study, and (3) a multi-case study applying a grounded theory strategy. These studies provide enlightenment and lessons for future Chinese case studies.