城建发展：公司对控股子公司提供的担保总额53.39亿元

Group 1 - The company announced a total external guarantee amount of 6.479 billion yuan, which accounts for 29.13% of the latest audited net assets [1] - The total guarantee provided to its controlling subsidiaries is 5.339 billion yuan, representing 24% of the latest audited net assets [1] - The company has not provided any guarantees to its controlling shareholders, actual controllers, or their related parties, and there are no overdue recoveries on external guarantees [1] Group 2 - The industry is witnessing a significant shift towards semi-solid state batteries, with expectations for multiple new vehicle models to adopt this technology this year [1] - Major manufacturers are preparing for advancements in power battery technology, indicating a year of iteration and innovation in the sector [1]