1. Download China Petroleum app, get it in China Petroleum app, and click the page.
2, find the card package, click on the card package, which has a complimentary car wash roller.
3. China Petroleum app Collection is a collection of related mobile phone software, which not only provides you with services such as car refueling, gas station navigation and inquiry, but also has functions such as code scanning payment, oil card account inquiry and refueling recharge.