Based on the search results, here's what I found: Rapid-Line Inc.'s auditor has raised substantial doubt about the company's ability to continue as a going concern due to recurring losses and limited operations. The company is an online education technology company focused on applying brain-computer interface (BCI) technology to its KIDWIN learning platform , but it has generated $0 in revenue over the trailing twelve months. Additionally, there was a significant change in control on March 18, 2025, when Jiang Jian acquired approximately 68.82% of the outstanding common stock. **Likely cause and investor risk in one sentence:** The company lacks revenues and operating cash flows, making the NT 10-K delay likely due to auditor and accounting coordination challenges surrounding the going concern uncertainty and the recent ownership change, exposing investors to the extreme risk of total capital loss if the company cannot secure immediate additional financing.