The change of weather mainly refers to the change of weather elements such as cloudy, sunny, wind, rain, temperature and humidity. These changes will have an impact on the timbre of erhu. Under the humid southern production, I have never heard that the timbre is dull because of humidity. In terms of anti-dryness, even if erhu is sold all over the country, even in Urumqi and Tibet, Xinjiang, it has never been heard that the dry climate there leads to brittle timbre. However, the protection of erhu is still necessary! In order to prevent moisture, we can put desiccant in the baby's box near the piano barrel to absorb moisture. In order to prevent dryness, the middle and high-grade erhu produced in the south is used in the north, and it needs to be away from heating in winter. If there is a piano cabinet in the dry season, you can put a small bowl of water in it to prevent dryness; When storing erhu, keep it away from the heating in winter and put it in the piano box.