华兰疫苗：关于继续使用部分闲置募集资金进行现金管理的公告

Group 1 - The core point of the article is that Hualan Vaccine has announced the approval of its board to utilize up to 1 billion yuan of idle raised funds for cash management, ensuring it does not affect ongoing projects and normal operations [2] - The funds will be used for structured deposits and large certificates of deposit, which are capital-preserving products [2] - The investment period for these funds is set to be within 12 months from the date of board approval, allowing for rolling usage [2]