1. In Chinese mainland, the 12 hour system is usually used, especially in the southern region. Therefore, the company may have followed the local cultural traditions.
2. Global standard: Many countries and regions use the 12 hour system, such as the United States, Canada and Australia. Therefore, if companies need to do business with these areas, using the 12 hour system can better meet global standards.
3. Work efficiency: For some industries, such as manufacturing, 12 hour system can make better use of equipment and human resources and improve work efficiency.