YJK: Stock trading has increased by more than 30% for three consecutive days

YJK announced that the closing price of the company's stock increased by more than 30% over three consecutive trading days on October 10, 2025, October 13, 2025, and October 14, 2025. The company's board of directors conducted a self-examination and verified through phone calls and on-site inquiries whether the company and relevant personnel had any significant matters that should have been disclosed but were not, confirming that there were no such situations. The company's recent operating conditions and internal and external environment have not undergone significant changes, and the actual controller did not buy or sell the company's stock during the period of abnormal fluctuations. At the same time, the company reminds investors to pay attention to investment risks and make rational decisions