Market Overview - The A-share market showed mixed performance on December 29, with the Shanghai Composite Index closing up 0.04% at 3965.28 points, while the Shenzhen Component Index and the ChiNext Index fell by 0.49% and 0.66%, closing at 13537.10 points and 3222.61 points respectively [1] - The total trading volume in the Shanghai and Shenzhen markets was 21,393 billion yuan, a slight decrease of 209 billion yuan from the previous trading day [1] - The market saw 1,995 stocks rise, with 87 hitting the daily limit, while 3,332 stocks fell, with 25 hitting the lower limit [1] Sector Performance - The chemical fiber, petroleum, diversified finance, and aerospace sectors led the gains, while energy metals, pharmaceutical commerce, batteries, electronic chemicals, traditional Chinese medicine, and the power sector experienced significant declines [1] - The robotics sector saw a strong rally, particularly in PEEK materials and exoskeleton robots, following the establishment of a standardization committee for humanoid robots and embodied intelligence technology by the Ministry of Industry and Information Technology [2] Individual Stock Highlights - Aerospace Hangyu, a commercial aerospace concept stock, surged by 20%, with its main business focusing on aerospace products, satellite communication, and testing equipment [3] - The company reported earnings per share of 0.13 yuan and a net profit of 51.48 million yuan for the third quarter of 2025, reflecting a year-on-year growth rate of 0.56% [3] - Aerospace Hangyu has secured a contract worth 246 million yuan for a mobile tail-end docking work platform and a full-machine flexible docking system from Shanghai Aircraft Manufacturing Co., and has become a major supplier to state-owned enterprises in the aerospace sector [3] Technical Analysis - Despite the Shanghai Composite Index achieving a nine-day winning streak, recent trading sessions have shown long upper shadows, indicating significant selling pressure and a lack of momentum in the index's upward movement [3] - The MACD indicator is showing a shortening of the red bars, and the KDJ indicator's J line is turning downward, suggesting potential market weakness ahead [3]