Test chip industry is divided into wafer testing and finished product testing, with different testing nodes and procedures. Customized services are provided to ensure improved terminal product quality rate and cost control. Chinese Mainland enterprises are showing a strong growth momentum in the test chip market, with great room for development. Jinyu Semiconductor is an example of a Chinese semiconductor enterprise engaging in independent test chip business, using advanced testing equipment and forming a technical team with rich experience. Chip aging testing is an electrical stress testing method to ensure the reliability of semiconductor components before assembly into the system, identifying potential defects and reducing early failures.