成大生物：全资子公司获得《药物临床试验批准通知书》

Group 1 - Company Changda Biological announced that its wholly-owned subsidiary, Changda Biological (Benxi) Co., Ltd., received approval from the National Medical Products Administration for clinical trials of a high-dose influenza virus split vaccine [1] - The approval highlights the long and uncertain development cycle of vaccine products, which may be influenced by various factors [1] Group 2 - Investors should exercise caution and consider investment risks associated with the vaccine development process [1] - Notable investments in the company include a joint investment of 1 billion yuan each from prominent investors Ge Weidong and Fang Wenyuan, leading to a significant increase in the company's stock price [1]