Aviation Industry Corporation of China (02357.HK) announced that its subsidiary Aviation Industry Helicopter Co., Ltd. (600038.SH) reported its first-quarter performance as of the end of March this year, with operating income of RMB 2.376 billion, a year-on-year decrease of 29.5%; net profit attributable to shareholders of the listed company was RMB 202 million, a year-on-year increase of 55.1%; earnings per share were 24.63 cents