Changchun Yidong: Cumulative share price increase is relatively large; trading risk warning issued.

Changchun Yidong announced that its stock has cumulatively risen 33.11% since October 16, 2026, significantly higher than the 0.75% gain of the Shanghai A-share Index and the 6.06% gain of the auto parts industry over the same period, with three limit-up trading days during the period. As of October 20, 2026, the company's static price-to-earnings ratio was 243.88, higher than the static P/E ratio of 28.49 for the "other auto parts" industry in which it operates; on that day, the company's stock turnover rate was 22%, significantly higher than the average turnover rate of 1.98% over the previous five trading days. There have been no major changes in the company's fundamentals, and there is no major information that should be disclosed but has not been disclosed. Investors are advised to be aware of investment risks.