Polymer-modified cement-based materials have been widely used in building materials. Polymers play a crucial role in improving the performance of cement-based materials. At the same time. different polymers are added according to specific special requirements to meet the needs of the industry. https://uhmrdrqy1fgjvw.timeblog.net/70682979/the-impact-of-fintech-development-on-the-entrepreneurial-behavior-of-farmers-evidence-from-the-china-household-finance-survey