In Didi, the cheapest is a ride. If you are commuting, you can choose a ride, but it is best not to choose at night, especially for girls. Secondly, express trains are similar to taxis, but express trains often issue some coupons, which can save some money. Moreover, you can pay attention to the surrounding apps, such as Baidu Map and China Merchants Bank, and there are often some coupons to collect. If the number of taxis is less than or equal to 3, priority should be given to hitchhiking. You can make an appointment for hitchhiking before you travel. The price of hitchhiking is a bite, and the time fee will not be increased due to traffic jams caused by morning and evening rush hours or other uncontrollable factors, and the mileage fee is relatively low. If the number of taxis is more than 3, and the road conditions are good, it will not cause long-term traffic jams, and you can choose the express train. The mileage fee for a three-person ride is 1.68-2. 1, which is higher than that of the express train1.6; If the road conditions are very bad, it is foreseeable that there will be long-term congestion during the trip, and the long-term fee of the express train will increase the cost; The above two conditions are only based on the condition that you can book a ride, so you need to book a ride in advance before you leave; In addition, the express train has a carpooling function. If the time is not very tight, you can choose the carpooling function of the express train, which will also save some expenses. To sum up, when taking a taxi, you need to consider the road conditions and the number of people traveling. Follow the wind if you can, use the express train if you can't, and give priority to carpooling. Of course, you can get some coupons, and Didi can still be redeemed for coupons. When you take a taxi with Didi, you'd better buy a coupon or something. Many times there are coupons every week, some monthly cards and the like, which are very cost-effective, and some coupons for weekends. In short, you can make a lot of money with this coupon. Moreover, it is best to carpool when Didi takes a taxi, which can also help you save a lot of money.