The service provided by the car rental platform is extremely frustrating. When I encountered a problem picking up the car, I couldn't effectively negotiate with the local store and had to consult with the car rental company's headquarters, which takes 20 working days! It's hard to imagine how helpless a tourist feels when they can't pick up their car in a foreign country while the platform does nothing! Nearly 10 days have passed, and the platform has not proactively contacted me, provided any solutions, or given any updates, constantly avoiding the issue. Everyone needs to pay attention to which stores accept UnionPay cards when booking a car. However, the platform now sets it so that UnionPay cards are not accepted, avoiding their responsibility for not understanding the store's services. To avoid losses, make sure to call the store in advance to confirm. Based on my personal experience, at the San Francisco airport rental hall, Hertz, Dollar, and Thrifty accept UnionPay cards, and their services are excellent. Be cautious about booking with Sixt; they do not accept UnionPay cards and deliberately list many low-priced models without insurance to attract customers. In California, you cannot drive without third-party liability insurance, and the store will force you to purchase it for an extra $20+ per day. I strongly condemn such unscrupulous practices by Sixt. Hertz's service is very professional, but the compact car group is not very practical. I intended to book a Ford Focus or Toyota Corolla but ended up with a Honda Brio. I had to upgrade to a Camry for an additional cost, which was quite surprising as the Camry was very new, with less than 3000 miles, and felt like a high-end car. In the future, renting from the mid-to-large car group seems more reliable.