According to Yonhap, on September 21 local time, the spokesperson for the President's Office of South Korea, Seung-Ho Hong, held a press conference and stated that Jiang Sun-sik, the head of the presidential secretariat, expressed his resignation to President Lee Jae-myung that day.
Some believe that recent personnel disputes, including those involving former Justice Minister candidate Kim Seung-yoon, have continued to escalate. This may have made Kang Hun-sik feel a heavy sense of responsibility and led him to resign.

South Korean President's Secretary-General, Kang Hun-sik, Yonhap
According to reports, Jin Sheng announced his withdrawal from the nomination process on September 19th.
He expressed regret that he did not meet the expectations of the nation, and said he would reflect deeply on his shortcomings. “I am grateful to the president for nominating me as the Minister of Justice, but I failed to meet the president’s expectations, which makes me feel deeply guilty. The government should take into account the people’s feelings and complete the reform efforts. I believe that the burden on the government should not be increased, so I have decided to withdraw my nomination.”
After being nominated, Jin Shengyuan has been involved in many controversies. For example, he is suspected of soliciting approval for new drug clinical trials.
After the personnel hearing for Kim Seung-yeon was held in the Korean Council, the United Democratic Party of Korea forcibly passed its personnel hearing report on the 17th. However, Lee Jae-myeong stated at a press conference on the 18th that a final decision has not been made regarding the appointment of Kim Seung-yeon, and he will make a careful decision considering factors such as public expectations.