Group 1 - Dayun Technology's stock price fell by 2.24% to 45.82 yuan as of the close on July 23, 2023 [1] - The company was listed on the Shanghai Stock Exchange's Sci-Tech Innovation Board on March 31, 2023, with an initial public offering of 19.85 million shares at a price of 152.38 yuan per share [1] - On its first trading day, Dayun Technology reached a peak price of 241.11 yuan, which remains its highest price since listing [1] Group 2 - The total funds raised from the IPO amounted to 302.50 million yuan, with a net amount of 273.08 million yuan, exceeding the original plan by 213.08 million yuan [1] - The company planned to use the raised funds for X-ray source industrialization, construction of an X-ray detection equipment production base in Chongqing, R&D center construction, and to supplement working capital [1] - The total issuance costs for the IPO were 29.42 million yuan (excluding tax), with underwriting fees accounting for 26.18 million yuan [1] Group 3 - On April 11, 2025, Guotai Haitong Securities Co., Ltd. held a restructuring and renaming ceremony at the Shanghai Stock Exchange, changing its A-share name from "Guotai Junan" to "Guotai Haitong" while retaining the A-share code "601211" [2] - Dayun Technology announced a dividend plan on May 31, 2024, proposing a stock bonus of 4.5 shares for every 10 shares held and a pre-tax dividend of 8 yuan [2] - On July 4, 2025, Dayun Technology released another dividend plan, offering a stock bonus of 4.5 shares for every 10 shares held and a pre-tax dividend of 6 yuan [3]

Group 1 - Dayun Technology (688531.SH) closed at 63.40 yuan, with a decline of 7.01% [1] - The company was listed on the Shanghai Stock Exchange's Sci-Tech Innovation Board on March 31, 2023, with an initial public offering (IPO) of 19,851,367 shares at a price of 152.38 yuan per share [1] - On the first day of trading, Dayun Technology reached a peak price of 241.11 yuan, marking the highest point since its listing, but has since experienced a downward trend and is currently in a state of loss [1] Group 2 - The total amount raised from the IPO was 302,495.13 million yuan, with a net amount of 273,079.07 million yuan, exceeding the original plan by 213,079.07 million yuan [1] - The funds raised are intended for projects including X-ray source industrialization, the construction of an X-ray detection equipment production base in Chongqing, a research and development center, and to supplement working capital [1] - The total issuance costs for the IPO amounted to 29,416.06 million yuan (excluding tax), with Haitong Securities receiving underwriting fees of 26,178.79 million yuan [1] Group 3 - Haitong Innovation Securities subscribed to 3% of Dayun Technology's IPO, acquiring 595,541 shares for a total investment of 90,748,537.58 yuan [2] - On April 11, 2025, Guotai Haitong Securities Co., Ltd. held a ceremony for its restructuring and name change on the Shanghai Stock Exchange, officially changing its A-share name from "Guotai Junan" to "Guotai Haitong" while retaining the A-share code "601211" [2] - The name change signifies the completion of the merger and restructuring process between Guotai Junan and Haitong Securities [2]