[noon announcement: Changchun Hi-Tech part Dong Jiangao increases its stake in 34700 shares of the company] Financial Associated Press, April 21, a number of companies issued lunch announcements, as follows: ① Changchun Hi-Tech: chairman Ma Ji, Director and General Manager Jiang Yuntao, Director and Executive Deputy General Manager Ye Peng and others increased their holdings of 34700 shares in the company on April 21. The above-mentioned personnel voluntarily promised that the increased shares will not be reduced within 12 months from the date of the increase. ② Oriental Yuhong: it is estimated that the net profit of returning home in the first quarter is 365 million yuan to 397 million yuan, an increase of 15% and 25% over the same period last year. ③ Silver Star Energy, Jiawei Xinneng: applications for issuing shares to specific targets are accepted by the Shenzhen Stock Exchange.