正海生物收盘上涨1.29%，滚动市盈率31.55倍，总市值38.14亿元

Core Insights - Zhenghai Biological's stock closed at 21.19 yuan, up 1.29%, with a rolling PE ratio of 31.55, marking a 64-day low, and a total market capitalization of 3.814 billion yuan [1] - The average PE ratio in the medical device industry is 51.87, with a median of 37.48, placing Zhenghai Biological at 67th in the industry ranking [1] - The company experienced a net outflow of 1.9014 million yuan in principal funds on July 16, with a total outflow of 12.4302 million yuan over the past five days [1] Company Overview - Zhenghai Biological focuses on the research, production, and sales of biological regenerative materials, with key products including oral repair membranes, absorbable dura mater patches, bone repair materials, and surgical sponges [1] - The company was recognized as one of the top 50 new material leading enterprises in Shandong Province for 2023 [1] Financial Performance - In the first quarter of 2025, Zhenghai Biological reported revenue of 97.4158 million yuan, a year-on-year increase of 8.68%, while net profit was 26.6267 million yuan, reflecting a year-on-year decrease of 34.06%, with a gross profit margin of 80.96% [1]