Core Viewpoint - The automotive safety industry is transitioning towards digitalization and precision, with a focus on developing a series of human digital models that cover multiple physical characteristics and scenarios. The China Automotive Engineering Research Institute (CAERI) has led the development of the first series of Chinese anthropometric digital models (AC-HUMs), which now includes the release of a 5th percentile female digital model available for free trial across the industry, marking a significant advancement in safety protection for all genders in vehicles [1][12]. Group 1: Model Development - The AC-HUMs 05F model is based on multimodal medical imaging data (CT/MRI/X-Ray) from Chinese female volunteers and has undergone dual calibration to ensure geometric standardization and anatomical accuracy, providing more precise safety protection for female road users [6][12]. - The AC-HUMs model family was developed using entirely Chinese anthropometric data, ensuring that the model parameters are representative of the Chinese population, thus achieving the goal of "Chinese data defining Chinese models" [12]. Group 2: Technical and Validation Framework - The development process involved collaboration with experts from eight top universities in China, focusing on segment-specific modeling and technical challenges, with CAERI overseeing the project and validation of the full-body model [12]. - A comprehensive validation system was implemented, including 42 segment-level and 23 full-body biological realism validation tests, alongside real-world accident data for accident reconstruction verification, ensuring the model's biological realism and practical engineering value [12]. Group 3: Industry Collaboration and Innovation - CAERI established a collaborative platform called the Human Model Joint Application and Innovation Center, aimed at promoting model development and establishing evaluation application standards, which has hosted 13 industry seminars and made 15 presentations at international conferences [14]. - The center plans to form a virtual evaluation research group with international human modeling experts by 2025 to foster continuous innovation and collaboration within the industry [14]. Group 4: Model Trial Application Process - Interested parties can apply for a trial of the model by downloading and completing the application form, which must be stamped by the organization and sent via email to CAERI for review [18][19]. - Initial applicants are required to sign a confidentiality agreement before receiving the model and user manual, with the trial period available from now until February 6, 2026, for a maximum duration of three months [21].