盟升转债收盘上涨4.17%报221.166元/张，成交额6.00亿元，转股溢价率7.58%

Group 1 - The core viewpoint of the news is the performance and characteristics of Mengsheng Convertible Bonds, which closed at 221.166 yuan per share with a trading volume of 600 million yuan and a conversion premium rate of 7.58% [1] - Mengsheng Convertible Bonds have a credit rating of "A" and a maturity period of 6 years, with a coupon rate that increases over the years, starting from 0.20% in the first year to 2.50% in the sixth year [1] - The underlying stock for the convertible bonds is Mengsheng Electronics, which is engaged in satellite navigation, satellite communication, electronic countermeasures, and data link technology [1] Group 2 - For the first quarter of 2025, Mengsheng Electronics reported a revenue of 21.113 million yuan, representing a year-on-year increase of 48.01% [2] - The net profit attributable to shareholders was -0.15 billion yuan, showing a year-on-year increase of 30.88%, while the net profit excluding non-recurring items was -0.195 billion yuan, up by 26.22% year-on-year [2] - As of March 2025, the concentration of shareholding in Mengsheng Electronics is high, with the top ten shareholders holding a combined 49.52% and the top ten circulating shareholders holding 49.54% [2]