The rental system is very rigid and has many pitfalls. No matter when you pick up or return the car, if it's less than a full day, make sure to select 00:00 for pickup and 23:00 for return. Even though I paid for a whole day for just over 7 hours, they still charged me an extra hour. Overall, I ended up paying for 2 days for those 7 hours. The platform's customer service insisted their system is fine, stating that if you return the car early, you won't get any money back, but if you're an hour late, they'll charge you for a whole day. So, be mindful to add a few extra hours when selecting your return time, as you'll be paying for that time anyway.