*ST Wingtech: Board Secretary Tu Zhengfeng Resigns for Personal Reasons *ST Wingtech announced on June 22 that its board of directors recently received a written resignation report from its board secretary, Tu Zhengfeng. Tu Zhengfeng resigned from his position as board secretary for personal reasons. After the resignation takes effect, he will no longer hold any position in the company. The resignation is effective from the date the application was submitted to the board of directors. During the vacancy of the board secretary position, Chairman Yang Mu will act as the board secretary.