1. Online inquiry: log in to PetroChina official website and find the inquiry function of relevant transaction records. After logging in, enterprise users can find the transaction record page on the website to inquire about diesel property rights.
2. Contact the sales representative: As a big customer of PetroChina, we have contact channels with the sales representative, and we can directly consult and ask the sales representative for diesel property rights information, and provide help and needed information.
3. Go to the business hall of PetroChina: You need to obtain important information such as the long-term cooperation with PetroChina, and go to the nearest business hall of Sinopec. There, you can contact the window staff or the staff responsible for business management, and ask for the relevant materials and property certificates.