For children, due to physical growth reasons, they usually change a pair of shoes every quarter, which is about 3 months. For adults, it depends on the quality of the shoes. Generally, shoes with better quality can be worn for about 2-3 years. Shoes with poor quality may break after about 3 months of wear, and changing multiple pairs of shoes will reduce the wear and tear of the shoes. For example, if a pair of shoes is worn for 3 months, alternating between two pairs of shoes will not last for more than 6 months. For example, if you change to another pair of shoes the next day, this pair will have a break and maintenance time, so it is not easy to break down.