李子园、中创环保等多家上市公司董监高收警示函或监管函

Group 1 - Multiple companies including Liziyuan, Zhongchuang Environmental Protection, Hongxin Electronics, and Xiangnan Chip Creation received regulatory warnings due to short-term trading activities involving their executives or relatives [1][2][3] - Liziyuan's director Su Zhongjun was warned for selling shares and then buying them back within six months, resulting in a profit of 3,200 yuan [2][3] - Zhongchuang Environmental Protection's supervisor Shen Jiamei was issued a regulatory letter for failing to ensure compliance in trading activities conducted by his mother [3] Group 2 - Highlan Co. and Jiaokong Technology also faced regulatory scrutiny for failing to disclose changes in shareholding in a timely manner [4][5] - Highlan's shareholders Huang Zefeng, Cheng Yina, and Huang Yanzha violated regulations by not reporting their shareholding exceeding 5% [4] - Jiaokong Technology's original shareholder Beijing Jishi Chuangye Investment Fund received a warning for not notifying the company of significant changes in shareholding [4][5]