先进数通：公司及控股子（孙）公司提供担保总余额1.64亿元

Group 1 - The company announced that its wholly-owned subsidiary, Beijing Advanced Digital Technology Co., Ltd., applied for a comprehensive credit line from a bank to meet its operational needs [1] - The company provided guarantees for the financing within the credit line applied by its subsidiary, with a total guarantee amount of 750 million yuan, which accounts for 45.67% of the company's most recent audited net assets [1] - The total balance of guarantees provided by the company and its controlling subsidiaries is 164 million yuan, representing 9.97% of the company's most recent audited net assets [1]