超声电子：对控股子公司增资4亿元

Group 1 - The company announced an investment of 400 million yuan in its subsidiary, Shantou Ultrasonic Printed Circuit Board (Third Factory) Co., Ltd [1] - After the investment, the company will hold an 86.67% stake in the subsidiary [1] - The purpose of the investment is to support the subsidiary in implementing a "high-performance HDI printed circuit board expansion and upgrade technology transformation project," enhancing its capital strength and core competitiveness, and optimizing its financial structure [1]