Yinan Zhou

Conflicts of Interest The authors declare no conflicts of interest. References 1, “ Polypropylene as a Promising Plastic: A Review,” 6, no. 1 (2016): 1–11. 2, , , et al., “Research and Application of Polypropylene: A Review,” Discover Nano 19, no. 1 (2024): 2. 3, , , et al., “Polypropylene/Calcium Carbonate Nanocomposites – Effects of Processing Techniques and Maleated Polypropylene Compatibiliser,” Express Polymer Letters 14, no. 10 (2010): 611–620.

1. Introduction As the basic host of people’s production and life, the city is essential to realizing high-quality socio-economic development. Since the founding of P.R. China 75 years ago, a series of world-renowned achievements have been made in urban construction and development. For instance, the urbanization rate of P.R. China’s permanent resident population increased from 10.64% in 1949 to 66.1% in 2023, along with the enlarging of city scale.

Abstract Seasonal spermatogenesis in fish is driven by spermatogonial stem cells (SSCs), which undergo a complex cellular process to differentiate into mature sperm. In this study, we characterized spermatogenesis in the large yellow croaker (Larimichthys crocea), a marine fish of significant commercial value, based on a high-resolution single-cell RNA-seq atlas of testicular cells from three distinct developmental stages- juvenile, adult differentiating and regressed testes.