[2-board Oriental Zhongke: The sales revenue of related vector network analyzers and their accessories, software and solutions accounts for a small proportion of revenue] On September 27, Oriental Zhongke (002819.SZ) issued an announcement of abnormal stock trading fluctuations. The vector network analyzers sold by the company involve many domestic and foreign brands. The related products are all agent products and are not self-developed products by the company. The company does not manufacture related products. The sales revenue of related vector network analyzers and their accessories, software and solutions in 2025 will be 124 million yuan, accounting for 3.84% of the company's operating revenue in 2025; the sales revenue from January to June 2026 will be 48.4324 million yuan, accounting for 3.62% of the company's operating revenue from January to June 2026. The above-mentioned revenue proportions are all small and have limited impact on the company's performance.