The China Shanghai Composite Index experienced a decline of 0.82% today, continuing a downward trend with a 0.7% drop over the past five days. However, the index has shown some resilience, gaining 0.33% over the last 30 days. In the large-cap sector, Tongyu Heavy Industry Co., Ltd. emerged as the top performer with a notable return of 19.94%, while UCloud Technology Co., Ltd. struggled, posting a loss of 10.79%. Mid-cap stocks saw Zhonghong Pulin Medical Products Co., Ltd. leading with a return of 20.02%, contrasted by Jiangsu Zeyu Intelligent Electric Power Co., Ltd., which fell by 11.45%. Among small-cap stocks, Guangdong High Dream Intellectualized Machinery Co., Ltd. achieved a return of 14.69%, while Zhejiang Chunhui Intelligent Control Co., Ltd. faced a decline of 12.13%. Overall, the market's advance-decline ratio indicates a challenging environment, with 1,383 stocks advancing against 3,508 declining, resulting in a ratio of 0.39. This trend is mirrored across large-cap, mid-cap, and small-cap stocks, suggesting a broader market struggle.