承诺增持未履约，证监局出手！

Group 1 - The article discusses the issue of companies failing to fulfill their share buyback commitments, highlighting cases involving Guangzhou Haiyin Industrial Group and Fuyang Quanfu Enterprise Management [1][2][4] - Guangzhou Haiyin announced a plan to buy back shares worth between 50 million to 80 million yuan but only executed a buyback of 13.4642 million yuan, falling short of the lower limit of their commitment [2][3] - Fuyang Quanfu promised to buy back 60 million yuan worth of shares in Jiawei New Energy but did not make any purchases by the deadline, citing difficulties in raising funds as the reason for non-compliance [4] Group 2 - The Guangdong Securities Regulatory Bureau issued a warning letter to Guangzhou Haiyin for not meeting its buyback commitment, which constitutes a violation of the regulatory guidelines [3] - The Shenzhen Securities Regulatory Bureau also issued a warning to Fuyang Quanfu for failing to fulfill its buyback promise, indicating a trend of regulatory scrutiny on such commitments [4] - A notable case involved Shanghai Jinlitai Chemical, where executives failed to fulfill a 300 million yuan buyback commitment, leading to a court ruling that required them to compensate investors for losses incurred due to the unfulfilled promise [5][6]