A股第二牛股被出具监管函，4个月已停牌核查5次

Group 1 - The core viewpoint of the article highlights the significant stock price increase of Tianpu Co., which rose 1645% in 2025, making it the second-best performer in the A-share market [2] - Tianpu Co. experienced multiple trading halts due to stock price volatility, with a cumulative increase of 48.31% from December 3 to December 30, leading to a suspension of trading on December 31 for regulatory review [2][4] - The company has been under scrutiny for information disclosure violations, as indicated by the regulatory letter issued by the Shanghai Stock Exchange on December 31 [1] Group 2 - The stock price surge began after an announcement on August 21 regarding a proposed acquisition by Zhonghao Xinying Technology Co., which led to a cumulative increase of 718.39% from August 22 to December 30 [4] - Tianpu Co. faced multiple trading halts and regulatory reviews due to abnormal trading fluctuations, with the stock hitting the daily limit up for 15 consecutive trading days from August 22 to September 23 [4] - The company has issued several announcements regarding stock price fluctuations, indicating ongoing regulatory attention and market volatility [4]