Guodun Quantum announced that Zhang Aihui, chairman of the company's supervisory board, recently received the “Decision on Issuing Warning Letter Measures against Zhang Aihui” issued by the Anhui Securities Regulatory Bureau. Her spouse bought 2,800 shares of the company's shares between February 17, 2023 and March 22, 2024, with a total transaction amount of 318,400 yuan; sold 2,800 shares of the company's shares, with a total transaction amount of 343,300 yuan. The above acts violate the relevant provisions of the Securities Law and constitute short-term transactions. The Anhui Securities Regulatory Bureau decided to take administrative supervision measures to issue a warning letter against Zhang Aihui and record it in the securities and futures market integrity file.