Group 1 - The core point of the article highlights the dramatic stock performance of *ST Guandao, which experienced a "limit down" followed by a "limit up" within the same trading day, marking it as the first stock in the Beijing Stock Exchange history to exhibit such a phenomenon [1] - As of July 31, the stock opened at 6.6 yuan per share and reached a historical low of 2.4 yuan per share on June 23, resulting in a significant rebound with a price increase of 4.1 times from the historical low by the end of July 31 [1] - The company specializes in digital products and services for industrial enterprises, as well as digital talent training and research innovation platform services [1] Group 2 - The company is facing a delisting risk warning due to an "unable to express opinion" audit opinion on its 2024 annual report, which is set to take effect on April 29, 2025 [1]