How to inquire about the environmental protection license of Sichuan excavator To inquire about the environmental protection license of Sichuan excavator, you can go to the website of Sichuan Environmental Protection Department and call the local environmental protection department. Explanation of inquiring about the environmental protection license plate of Sichuan excavator The website of Sichuan Environmental Protection Department provides an environmental protection license plate inquiry system, and users can input the license plate number of the excavator for inquiry. The local environmental protection department also provides consultation telephone numbers, through which users can get relevant information and make inquiries.