突发！涉嫌严重职务违法，郭旭东被查！

Group 1 - The article reports that Guo Xudong, former chairman of the Issuance Review Committee of the China Securities Regulatory Commission (CSRC), is under investigation for serious job-related violations and has voluntarily surrendered to authorities [2][4] - Guo Xudong has over 20 years of service at the CSRC, primarily involved in IPO review work, and has held various positions including member of the issuance review committee across multiple terms [2][4] - His career at the CSRC includes a return to the issuance review committee in September 2017, where he served as deputy director of the issuance supervision department, and he was later reported to have resigned in 2019 [4]