Yes, China has regulations on the disposal of used biodegradable mulch. The country has been increasingly focusing on environmental protection and sustainable waste management. According to these regulations, biodegradable mulch is considered a type of agricultural waste and must be disposed of in an environmentally friendly manner. This often involves composting or using it as a soil amendment to enrich the soil rather than landfilling. The specific regulations can vary by region, and local environmental protection bureaus may have additional guidelines. It's important for those handling biodegradable mulch to consult with local authorities to ensure compliance with all relevant laws and regulations.