Zheng Xing Xing Ye Ri Bao·2025-09-18 08:46Group 1 - The plastic sector saw a slight increase of 0.23% on September 18, with Jinfa Technology leading the gains [1] - The Shanghai Composite Index closed at 3831.66, down 1.15%, while the Shenzhen Component Index closed at 13075.66, down 1.06% [1] - Jinfa Technology and Guoen Co., Ltd. both experienced a 10% increase in their stock prices, closing at 24.08 and 52.47 respectively [1] Group 2 - The plastic sector experienced a net outflow of 1.115 billion yuan from major funds, while retail investors saw a net inflow of 1.035 billion yuan [2] - The trading volume for Jinfa Technology reached 575.86 thousand shares, contributing to a significant market presence [1] - The stock performance of various companies in the plastic sector showed mixed results, with some companies like Jiangsu Boyun and Pan-Asia Micro透 experiencing declines of over 4% [2][3]