Market Performance - The three major stock indices collectively rose in the past week, with the Shanghai Composite Index increasing by 0.11% to close at 3954.79 points, the Shenzhen Component Index rising by 0.67% to 13378.21 points, and the ChiNext Index up by 0.50% to 3187.53 points [2] - Approximately 52% of stocks experienced gains during the week, with 142 stocks rising over 15% and 15 stocks declining over 15% [2] - Sectors that performed well included electric equipment, non-ferrous metals, steel, and basic chemicals, while sectors that underperformed included telecommunications, beauty care, banking, and electronics [2] Top Performing Stocks - Time Space Technology (605178.SH) led the weekly gainers with a 61.08% increase, followed by Haixia Innovation (300300.SZ) with a 60.66% rise, and several other stocks exceeding 40% growth [3] - The top ten stocks in this week's bull market all had cumulative gains exceeding 39% [3] Company Acquisition and Business Expansion - Time Space Technology announced a plan to enter the storage sector by acquiring 100% of Jiahe Jingwei, which specializes in the research, design, production, and sales of memory modules and solid-state drives [5] - The acquisition is expected to integrate Jiahe Jingwei's assets into Time Space Technology, establishing storage as a second growth curve for the company [5] - Following the announcement, the stock price surged over 94% from October 23 to 31, reaching a record high of 69.82 yuan per share, with a total market capitalization of 6.9 billion yuan [5] Financial Performance - Time Space Technology has reported continuous losses from 2021 to the third quarter of 2025, with the latest figures showing third-quarter revenue of 71 million yuan, a year-on-year increase of 66.04%, but a net loss of 49.88 million yuan [6] Underperforming Stocks - Zhujiang Piano (002678.SZ) was the worst performer, with a decline of 26.87%, followed by Sainuo Medical (688108.SH) with a 25.00% drop, and several others falling over 20% [8] - Zhujiang Piano's business includes the research, manufacturing, and sales of pianos and digital musical instruments, as well as cultural education and media services [9] - The stock experienced volatility, with a rapid increase followed by two consecutive days of trading halts, resulting in a cumulative drop of over 26% [9][10] Market Speculation and Impact - The stock price fluctuations of Zhujiang Piano may be linked to speculative trading, with notable trading activity from well-known speculators [10] - Despite the significant price changes, the company stated that it has not identified any undisclosed major information affecting stock prices and that its operational situation remains stable [10] - The company reported a continued loss in the third quarter, with a year-on-year decline in net profit of 58.18%, attributed to a sluggish market environment and rising production costs [10]