立案调查、留置、逮捕，多家上市公司董事“出事”

Core Viewpoint - Several A-share companies, including YK International, Tianyu Digital Science, Kesi Technology, and Xiling Information, announced that their directors are under investigation or have been detained for suspected illegal activities, but these matters are not expected to significantly impact their daily operations [3][4]. Group 1: Company Announcements - Dameng Data announced that its director and general manager, Pi Yu, is under investigation and has been detained, but the company expects no significant impact on its operations [5]. - Kesi Technology reported that its actual controller and director, Liu Jiande, has been detained and is under investigation, with daily operations managed by senior management and no significant impact on business [7]. - YK International disclosed that its chairman, Guo Baichun, has been arrested for suspected embezzlement and abuse of power, but this matter is personal and unrelated to the company, which continues to operate normally [9]. - Tianyu Digital Science stated that its director, Guo Baichun, is under arrest for personal matters during his public office tenure, with no impact on the company's operations [11]. - Xiling Information reported that its actual controller and director, Yue Yamei, is under investigation and has been detained, with the chairman temporarily assuming the general manager's responsibilities, ensuring normal operations [14].