Core Viewpoint - Multiple companies, including HeFu China, Tianji Co., Zhejiang Dongri, and Dongbai Group, have issued risk warnings regarding their stock trading due to significant price fluctuations and potential irrational market behavior [1][3][5]. Group 1: HeFu China - HeFu China reported a stock price increase of 200.75% from October 28 to November 12, with 11 out of 12 trading days closing at the涨停 price, indicating a significant deviation from its fundamentals [3]. - The company is currently in a loss position, and the stock price surge is attributed to market sentiment and irrational speculation, posing a risk of rapid decline [3]. Group 2: Tianji Co. - Tianji Co. announced a cumulative stock price increase of 215.24% over 28 trading days, indicating severe abnormal trading fluctuations [3]. - The controlling shareholder sold 8.4 million shares during this period, while the actual controller did not engage in any buying or selling of shares [3][4]. Group 3: Zhejiang Dongri - Zhejiang Dongri warned of potential market sentiment overheating and irrational speculation, as its stock price closed at 58.60 yuan per share, reflecting a significant short-term increase [4]. - The company operates in the agricultural product wholesale market and does not engage in "brain-computer interface" business [4]. Group 4: Dongbai Group - Dongbai Group's stock price has seen significant short-term increases, with static and rolling P/E ratios of 181.82 and 171.58, respectively, which are substantially higher than the retail industry averages [5]. - The company reassured that its business operations remain normal and have not undergone significant changes [5]. Group 5: Other Companies - San Yuan Co. reported a cumulative price deviation of over 20% across three trading days, indicating abnormal trading conditions [6]. - A notice from ST Zhongdi indicated a stock price increase of 153.19% from October 16 to November 12, leading to a suspension for investigation due to significant price volatility [7][9]. - ST Zhongdi's valuation metrics, including a static P/E ratio of -12.83, show a considerable deviation from industry averages, raising concerns about its financial health [9][10].